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Does anyone really need a 1Kw PSU?

Posted on 7th May 2010 at 09:44 by Richard Swinburne with 114 comments

Richard Swinburne
Having dropped into Antec recently (not literally, I used the lift), I noticed the company was preparing a thought-provoking demo PC - it was to show that even its TruePower 550W 80Plus Bronze rated PSU can power a system that includes a GeForce GTX 480 and Intel Core i7-980X CPU!

At idle the system used a not inconsiderate 172W of power, but under load that raised to 507W - still within the power rating of the PSU, although pushing it to 92 per cent use.

Does anyone really need a 1Kw PSU?
Click to Enlarge

Still, after playing with the system all day the Antec team claimed the setup was completely stable and even adding several hard drives and a few fans to this setup would still leave it under the full load mark, so at least you'd be getting your monies worth!

Obviously this leaves SLI out of the question, but after dropping nearly a ton on graphics cards you'd expect to be buying a beefier power supply anyway. Running the PSU "hot" when loaded will inevitably spin up the fan, but knowing the GTX 480s are modelled on aircraft engines (hot thrust out the back included), we couldn't hear the Antec running anyway.

Does anyone really need a 1Kw PSU?
Click to Enlarge

If you look carefully, you'll even see the Antec PSU can use the 4-pin and 8-pin CPU 12V power connectors on the Asus Rampage III Formula X58 motherboard underneath.

Power supplies are designed to be used in the 50-75 per cent load range for maximum efficiency, so while Antec's example just an extreme case - does it make a worthwhile point against the kilowatt bad-boys out there?

Is getting value for money and sweating PSUs to within an inch of their wattage ratting the future of PC design? Or do we need a better way to gauge component power use before purchase? Let us know your thoughts in the forums.

Does anyone really need a 1Kw PSU?

Does anyone really need a 1Kw PSU?
The power use figure is the upper right hand number. Click to Enlarge

114 Comments

Discuss in the forums Reply
smc8788 7th May 2010, 10:53 Quote
/waits for Star "z0mg-I-can't-believe-you-can-power-anything-more-than-a-pocket-watch-with that-500W-PSU" Dagger
rickysio 7th May 2010, 10:56 Quote
Anyone that uses a recent nVidia GPU.
scrimple3D 7th May 2010, 10:56 Quote
Personally, I prefer putting in a more powerful PSU than is absolutely necessary purely because it should hopefully be less stressed and therefore more likely to last longer.

The Antec PSU calculator (on their site) would also support this view, because they say that due to capacitor aging, the PSU loses its maximum capacity over time.
LordBen5000 7th May 2010, 11:00 Quote
SLI Fermi anyone?
smc8788 7th May 2010, 11:03 Quote
Quote:
Originally Posted by scrimple3D
The Antec PSU calculator (on their site) would also support this view, because they say that due to capacitor aging, the PSU loses its maximum capacity over time.

And it has nothing at all to do with wanting to sell more expensive, higher rated PSUs? ;)
Quote:
Originally Posted by rickysio
Anyone that uses a recent nVidia GPU.

It would help if you read the blog post.
Cyberpower-UK 7th May 2010, 11:05 Quote
I've always found the Extremeoutervision PSU calculator to be a good starting point: http://extreme.outervision.com/psucalculatorlite.jsp it recommends 558W for a system like this, if you take ageing into account and put it in a fairly restrictive case, then put the PC under a desk and the desk in the hottest room in the house on the hottest day of the year and 550W will not be enough and you'd risk it burning out during a long gaming session, take ageing into account and it gets worse.
rickysio 7th May 2010, 11:05 Quote
@smc8788

You should read it too, and MORE articles - running a PSU at near full load isn't very healthy, and stressing it so much may lead to early failure...
smc8788 7th May 2010, 11:10 Quote
Quote:
Originally Posted by rickysio
@smc8788

You should read it too, and MORE articles - running a PSU at near full load isn't very healthy, and stressing it so much may lead to early failure...

But would you really need a 1kW PSU? :|
Jack_Pepsi 7th May 2010, 11:10 Quote
The enlarged images aren't working for me, are they working for anyone else?
Cyberpower-UK 7th May 2010, 11:14 Quote
Quote:
Originally Posted by Jack_Pepsi
The enlarged images aren't working for me, are they working for anyone else?

404
Quote:
Originally Posted by smc8788
But would you really need a 1kW PSU? :|

A decent 1kW unit is recommended minimum for GTX480SLi
Farting Bob 7th May 2010, 11:15 Quote
One review site (cant remember which) tried triple SLI 480's and an intel extreme CPU and it under full synthetic load reached 1007w. But the number of people who buy 700w+ PSU's and then put them in systems that will never reach more than 450-500w is funny. I know someone who put a 900w corsair PSU in a system that had a i7-750 and 5850. He said "but im gunna overclock it so i need the headroom". Lol.
Ph4ZeD 7th May 2010, 11:18 Quote
I'm running what most people would consider as too much on my HX620 (SLI'ed 260 GTX cards) and I've had no stability issues, even looping Crysis benchmarks. So yes, death to the PSU exagerators!
kempez 7th May 2010, 11:23 Quote
Quote:
Originally Posted by smc8788
But would you really need a 1kW PSU? :|

Pretty much no-one needs a 1kw PSU.

I've got a Corsair 750w in my rig - works perfectly. Mine only draws about 400w at max load :)
Redkachina 7th May 2010, 11:24 Quote
I ran my OC'ed PII 965 + CF'ed 4770 + 10x 120mm fans + 3HDD + 2SSD.. on a 425W PSU lol..
still enough power but its already on 90% side..
javaman 7th May 2010, 11:36 Quote
Running stable for a day is one thing, how about a year? Surely running at 90%+ capacity will cause the PSU to die quicker, still be less efficient than running at a lower capacity and limit upgrades.

Great PSU tho don't get me wrong but I'd still rather have that overhead and not 300W+ overhead but 600W is more than enough.
Mr T 7th May 2010, 12:39 Quote
"but after dropping nearly a ton on graphics cards"

But a ton is £100?
TWeaK 7th May 2010, 12:40 Quote
My computer has never drawn more than about 240W from the wall, yet my Seasonic 420W PSU would struggle to cope - I particularly noticed this on cold boots when the fans wouldn't spin up fully and the lights stayed dim. The trouble with smaller PSU's is that they have little current available to the lower voltage rails, so if you have a lot of hard drives, fans and/or drive bay devices you can max out some of the rails before reaching the maximum rated power.

Really though you never need more than about 550-750W unless you're running SLi with those egg friers nVidia released recently.
wuyanxu 7th May 2010, 12:44 Quote
600w is perfectly MORE than enough for single card configurations. by enough, i mean keeping the load under 60%.

800w is perfectly more than enough for dual card configuration except for Fermi.

it's all about planning ahead, if you don't plan, then buy a 1kW supply and watch it go to waste with really bad efficiency due to not at optimum 50% load.
Psytek 7th May 2010, 12:51 Quote
I tend to calculate what a build will need, and then add 50-100W headroom depending on what kind of use it will see.

I do think people go way ottt though, talking of having a big psu so they can upgrade in the future, when in all likelihood that isn't going to happen, and really they just want to buy 'the best' hardware for bragging rights.

My gaming pc has dual gtx 260s, and I've been running it with a 620w PSU for over a year so far, so I'm certainly of the mind that you don't need a massive power supply. I have friends with single graphics cards with bigger PSUs than me, and I really don't understand their logic.
Sifter3000 7th May 2010, 12:51 Quote
Quote:
Originally Posted by Jack_Pepsi
The enlarged images aren't working for me, are they working for anyone else?

Fixed, sorry about that!
Xir 7th May 2010, 13:06 Quote
Most tend to be oversized yes. Running the PSU with too little load isn't great for efficiency, right?
I'd guess 600-650 watts would do for that system (to get down from 90+% load to 80 ish)
Cyberpower-UK 7th May 2010, 13:19 Quote
50% load is ideal. Quad SLi GTX480 with a heavily OC'd 980X can draw over 1.5KW: http://www.youtube.com/watch?v=7V13ZGIZgYY
tad2008 7th May 2010, 14:20 Quote
I tend to add on about 30% for a bit of head room based on my components maximum possible power draw and have found this a good rule of thumb.

For the system in this article I would have aimed for a PSU around 750w and a high efficiency branded model.

I have used cheap no-name brands before when things were tight and though some held their own, inevitably when things got hot and they had been in constant use for a couple of years they began to fail and cause system instability.
Xir 7th May 2010, 15:21 Quote
Quote:
Originally Posted by Cyberpower-UK
50% load is ideal. Quad SLi GTX480 with a heavily OC'd 980X can draw over 1.5KW: http://www.youtube.com/watch?v=7V13ZGIZgYY

...quad SLI...I rest my case:D
knuck 7th May 2010, 15:23 Quote
I used to believe 650W and up was overkill until my 500W coolermaster fried by powering 6 HDDs and the rest of my sig bellow

Now there is no way I will risk my rig again. Over power cheesecake
Singularity 7th May 2010, 16:13 Quote
I recently (ok, christmas) upgraded from an old EuroCASE 500W PSU (yeah, I didn't think so either :D) to a Corsair VX550. And I'm aware it's overkill for a single 4850 + an OC'ed Q6600 (I mean, 3.2 GHz isn't much of a clock), with some fans and a couple of hard drives. I think I have enough headroom for even the beefiest ATI card with the PSU, so I see no reason to go higher than that in any configuration I might think of :)
rickysio 7th May 2010, 16:33 Quote
I'm running a 600W OCZ StealthXStream with a stock Q6600 and a 9600GT.

Mostly because it was cheap (sales), and I won't need to upgrade my PSU for a long time, freeing up cash for other more important hardware. ;D
bigsharn 7th May 2010, 17:13 Quote
I'm using the PC + PSU in my sig purely because when I bought it I thought I was going to Xfire the 4850 (though I still might)
Jipa 7th May 2010, 17:45 Quote
Please don't make statements like "50% is ideal" without proof and/or without specifying the PSU it's optimal for. Comments like that just don't serve any purpose other than lowering the general level of comments.

I'm running HD4890 and overclocked Q9450 with a couple of hard drive from a 400 W power supply (passively cooled, mind you) and it's just fine. I think people still get confused by the power consumption measured from the wall, especially when those include the whole setup and they've been reading a graphic card review. Yes, it's always clearly stated, but I just think nothing else explains why just about every newer geek over-estimates the power consumptions.
Farfalho 7th May 2010, 18:45 Quote
Only Fermi's and dual gpu cards (not SLI or Crossfire) would need over 800W PSU. Single-cards from the 5870 down would only need at max 850W PSU in Crossfire or SLI arrangement. Kilowatt PSU's are for rich enthusiasts, I have a friend of mine that wanted to buy the Koolance 1600W watercooled PSU and besidee it's already prohibitly expensive with p&p from USA to Portugal it would be non-sense. If you want such a thing, by 2 800W psu's and join them together, it's cheaper and safer
rollo 7th May 2010, 18:54 Quote
so for quad sli

you need a 3kw psu for 50% is ideal

LOL LOL LOL

your a noob cyberpower

as a 3kw psu doesnt even exist.

1 in a billion people probably have quad sli 480 gtx

now back to real world

were the avr build is still in the £400-600 bracket

now tell me you need your 1kw psu.

i run my current pc on a 750 seasonic psu

i980 (4ghz water cooled overclock) + 5870 1 ssd 2 * 1tb drives few case fans

at the wall it uses 500 watts

if i added in a 2nd 5870 i could still run it of the same psu

system is nearly silent in use
Coldon 7th May 2010, 18:55 Quote
well the PSU calculator worked out that I need 940W for my system:

i5 750 at 4.5ghz
4 sticks DDR3 2000
24 phase high end mobo
GTX480 (which i'll be over volting and overclocking - so thats not included)
4 7200rpm drives
11 x 120mm fans, 1 x 250mm in my case atm
fan controller 30w per channel and a 18w DDC2 pump

right now i'm running a 650w corsair with a GTX260... so lets see when i get my gtx480 what happens...

I'm probably gonna need a 850w to be safe...
Fordy 7th May 2010, 18:57 Quote
It's not really all about wattage anyway, never has been.

Quote:
Originally Posted by rickysio
Anyone that uses a recent nVidia GPU.

Your either incredibly stupid or a really not that amusing "funny guy", which in itself makes you a fool.
Pete J 7th May 2010, 19:06 Quote
Quote:
Originally Posted by LordBen5000
SLI Fermi anyone?
HELLO!
Quote:
Originally Posted by Article
Does anyone really need a 1Kw PSU?
No I don't. I need at least a 1100W PSU :p.
memeroot 7th May 2010, 20:02 Quote
Quote:
Originally Posted by
Yes some do, most don't.
Main question - why - not 2 psu's
Star*Dagger 7th May 2010, 20:04 Quote
I once asked the members of my clan to take pictures of their PC and the surrounding area.

Exactly 2, out of 57 had their pc set up in an area with adequate flow of air.

Nothing I say will change anyone's mind, if you want to buy a PSU every year or two for your new PC, go for it. I have a 1250 that is in its 2nd computer.
The online calculators for wattage that I have seen put me above the anemic PSU BT constantly recommends.
I do find it interesting that here we have someone saying that running at 50%-75% is best, which would make all your recommendations for PSUs void.

I simply want my Gaming experience to be optimum, my PSU is pretty much the highest watt PSU one can buy (that is real high quality).
I build my computers like I play my Games, aim to be the best and fix it if I am not.
I sincerely hope that your PSU does not burn out when you are running a 650 watt PSU with high end procs and gpus. I have seen PSUs fail it is not pretty. If you insist on running a PSU at close to 100% please spend the money on a fire extinguisher, oh wait, that money could have be rolled into a better PSU.

Either way, no ZOMGS from me, you can make your own choices, and live (hopefully) with the consequences.

Yours in Quantum Singularity Powered Plasma,
Star*Dagger


P.S. FFS stop using XP, lol
HourBeforeDawn 7th May 2010, 20:06 Quote
Probably already said but ya you need a 1kw for running those poorly designed nVidia fermi cards.
InSanCen 7th May 2010, 21:54 Quote
I run a 1.2KW Akasa. On a system that ran happily on a 500W. Why? Because at £60, I couldn't pass it up. Does it need it? Not by a long shot. But, given that I test all sorts of kit for all sorts of people, then it's nice to have it, should I need it.

I also have plans to build a nice little 48 core system, which should stress it a little more ;-)
Fizzban 7th May 2010, 22:02 Quote
You tend to get less heat and more life out of a system if you use a slightly more powerful supply than you actually need. Ultimately it's all about the Wattage/Amperage on the rails though, and not what wattage the supply is. I certainly don't need a 1KW supply and I doubt most people who have one need it either.
Lockon Stratos 7th May 2010, 23:00 Quote
Quote:
Originally Posted by InSanCen
I run a 1.2KW Akasa. On a system that ran happily on a 500W. Why? Because at £60, I couldn't pass it up

thats where your making a mistake just like any other average joe who thinks a bigger number is better - its not about how many watts a PSU can kick out - its about the quality of components that go into making it. my corsair 750HX costs over twice as much as yours because bigger doesnt always = better. you may think your getting a great kick ass deal but in reality that cheap PSU could go boom well below its stated spec. & thats not something that happends once in a bluemoon, there are manufacturers there some big ones & small ones that deliberately lable a PSU 850w when really it can only do 700 at the most, stuff like this happends a lot with cheaper brands.

there are loads of guides on the net that tell you which manufacturer you can trust & which one to stay away from. I know some PSUs can be very very expensive but think of it as insurance - because if a bad PSU cant keep voltage regulated it could well 'blow up' & cause an outage that will spike & in most cases, kill your hardware. & thats something you dont want to happen. so i know it puts a dent in your wallet but a decent PSU especially a bronze/silver/gold rated one will save for a fair few quid on bills & also hassle from having to RMA dead hardware if its still under warranty.

I must insist that you do read some of the guides because i cant stress how important it is if your choosing to build a really expensive machine.
Krayzie_B.o.n.e. 7th May 2010, 23:24 Quote
You should have at least 100 watts to spare on your rig. As far as GPU's eating up PSU's I some how feel I'm the only one who appreciates ATi for making powerful GPU's that are cool, quiet, and energy friendly as I don't want that gasoline burning, terrorist oil supporting, nuclear heat producing, jet engine for a fan GTX 480 any where near my rig as I currently can't afford to build a Nuclear Reactor in my basement to power a SLI config or build a dam to water cool the stupid thing.
borandi 7th May 2010, 23:35 Quote
A PSU is like a car. If you buy a car with a top speed of 80mph and run it at 70mph all day, it'll wear down quickly and break quickly. Buy a car that does 150mph, and 70mph is a breeze. Same thing applies to PSUs.

I'm planning on running a 920 d0 and 2x 5850s on a 600W Enermax Modu 87+ Gold rated supply, as that's around 550W OC'ed, and I've seen upper wattage testing showing it's actual limit is around the 670W mark.
cdb 8th May 2010, 00:32 Quote
All the 80plus graphs I looked at showed 50% load was the most efficient for electricity consumed from the wall.

For that reason I bought an OCZZ1000m to run at 50% (or close) load and 90.93% efficiency on my pc that can pull 500-550W most of the time.

I prefer the car analogy as well and like to think of my psu cruising along all day not chucking out loads of heat, compared to a smaller psu running at 90%+ load all day.
wuyanxu 8th May 2010, 00:42 Quote
Quote:
Originally Posted by cdb

For that reason I bought an OCZZ1000m to run at 50% (or close) load and 90.93% efficiency on my pc that can pull 500-550W most of the time.

what PC have you got? even 3x gtx480 will struggle to pull 500w at idle, where idle is most PC's will spend most of its time.
Elton 8th May 2010, 01:15 Quote
I have a Antec True Power Trio 550w...

Works for my rig, plus it can support another HD4850 if I so desire.
Unicorn 8th May 2010, 01:31 Quote
I need a 1KW PSU because I'm running run a massive overclock on a quad core CPU, three dual core graphics cards, 6 GB of overclocked, overvolted RAM and two liquid cooling pumps.
sharpethunder 8th May 2010, 01:35 Quote
i use 1k watt but i use 2 5970 and 12 gd of ram and i just put the new intel 980 oc to 5 mhz
sharpethunder 8th May 2010, 01:36 Quote
Quote:
Originally Posted by sharpethunder
i use 1k watt but i use 2 5970 and 12 gd of ram and i just put the new intel 980 oc to 5 mhz
p.s it all watercooled
Infection 8th May 2010, 01:58 Quote
Quote:
Originally Posted by rollo
so for quad sli

you need a 3kw psu for 50% is ideal

LOL LOL LOL

your a noob cyberpower

as a 3kw psu doesnt even exist.

1 in a billion people probably have quad sli 480 gtx

now back to real world

were the avr build is still in the £400-600 bracket

now tell me you need your 1kw psu.

i run my current pc on a 750 seasonic psu

i980 (4ghz water cooled overclock) + 5870 1 ssd 2 * 1tb drives few case fans

at the wall it uses 500 watts

if i added in a 2nd 5870 i could still run it of the same psu

system is nearly silent in use


Seriously, I replied here just for you so I hope you feel special. Cyberpower was implying that for an average system ideally 50% load is what you should go for, obviously a Quad-SLI GTX 480 System is not an Ideal Average system and therefore the requirements are not equal to an Average Gamer PC I'm taking an educated guess that he posted the video to answer the "Does anyone need a 1000w+ Power Supply".

For gosh darn diddly (Watching the Simpsons :P) at least put some form of effort into making your Sentence? Paragraph? somewhat understandable. I stopped reading your post shortly after the 3k PSU comment as it was harming my eyes by reading it.

PS: I do however disagree with what Cyberpower said, 65% is a decent number with most of my builds being around 75%, my typical Power Supply age is around 3 - 5 years after which it's replaced with a more efficient / quieter model or it blows up because it's made by Rosewill.
cdb 8th May 2010, 02:04 Quote
Quote:
Originally Posted by wuyanxu
what PC have you got? even 3x gtx480 will struggle to pull 500w at idle, where idle is most PC's will spend most of its time.

Self built. I7 860 @ 3.8Ghz, 6GB ram, HAF 932 case, 2 hdds, 3 8800Gt gpus (was 4 but one died) running folding 24/7 so is never idling.
Unicorn 8th May 2010, 02:37 Quote
Quote:
Originally Posted by sharpethunder
i use 1k watt but i use 2 5970 and 12 gd of ram and i just put the new intel 980 oc to 5 mhz

You mean 5 GHz.
Unicorn 8th May 2010, 02:47 Quote
Quote:
Originally Posted by rollo
so for quad sli

you need a 3kw psu for 50% is ideal

LOL LOL LOL

your a noob cyberpower

as a 3kw psu doesnt even exist.

1 in a billion people probably have quad sli 480 gtx

now back to real world

were the avr build is still in the £400-600 bracket

now tell me you need your 1kw psu.

i run my current pc on a 750 seasonic psu

i980 (4ghz water cooled overclock) + 5870 1 ssd 2 * 1tb drives few case fans

at the wall it uses 500 watts

if i added in a 2nd 5870 i could still run it of the same psu

system is nearly silent in use

You need to chill out, think about what you're saying and visit the grammar and spelling thread in general whilst you're at it.
rickysio 8th May 2010, 05:16 Quote
Quote:
Originally Posted by Fordy
Your either incredibly stupid or a really not that amusing "funny guy", which in itself makes you a fool.

Sorry. Forgot that most fools on the internet don't understand the subtleties of sarcasm. I apologize for overlooking your intellect.
steve30x 8th May 2010, 12:01 Quote
Quote:
Originally Posted by sharpethunder
i use 1k watt but i use 2 5970 and 12 gd of ram and i just put the new intel 980 oc to 5 mhz
How did you manage to downclock that CPU to 5 MegaHertz?
ledbythereaper 8th May 2010, 12:22 Quote
And to think I can't run my fairly old rig on a 620W PSU :( Damn hard drives.
Pete J 8th May 2010, 12:51 Quote
Wow. I didn't know PSUs inspired so much rage in people...

At the end of the day, provided the PSU is a high quality model, who cares if someone has a PSU that could power a system three times over? I agree with Borandi; A PSU that isn't run flat out will survive much longer - it's just basic engineering logic.
Sifter3000 8th May 2010, 14:14 Quote
Quote:
Originally Posted by Pete J
Wow. I didn't know PSUs inspired so much rage in people...

Not often I agree with PeteJ*, but he's right... let's tone down the rage a bit plz
cybergenics 8th May 2010, 18:55 Quote
Corsair TX750W is a very good PSU, I have two, wish i'd gone for the HX range though, as I have cables all over the place and no good places to put them, in Coolermaster HAF 922.
[- pio -] 8th May 2010, 23:08 Quote
Quote:
Originally Posted by sharpethunder
i use 1k watt but i use 2 5970 and 12 gd of ram and i just put the new intel 980 oc to 5 mhz
Quote:
Originally Posted by steve30x
How did you manage to downclock that CPU to 5 MegaHertz?
That's not megahertz, it's millihertz! Five computational operations every 17 minutes :D
sharpethunder 9th May 2010, 00:57 Quote
i did to see if i can be done it acually oc 6.5 ghz
thehippoz 9th May 2010, 02:46 Quote
Quote:
Originally Posted by Pete J
Wow. I didn't know PSUs inspired so much rage in people...

At the end of the day, provided the PSU is a high quality model, who cares if someone has a PSU that could power a system three times over? I agree with Borandi; A PSU that isn't run flat out will survive much longer - it's just basic engineering logic.

yeah it goes way back to the g80.. people were buying into nvidia's minimum power specs until we saw a few guru's running sli and even tri sli with a 600w antec power supply.. they didn't pull what nvidia says but it sold alot of higher end psu's :D

the backlash to all that can still be felt today.. but I agree with you- just run over what you need and be done with it.. if you cut it too close and you have to upgrade later on- who's the real bozo :D
friskies 9th May 2010, 11:08 Quote
One thing we all can agree on: When a PSU is running close to it`s maximum output, the PSU fan will spin at a high RPM causing noise
fingerbob69 9th May 2010, 15:05 Quote
Surely it is in the nature of technological innovation that parts become more power efficient, relatively less power hungry when compared to their predecessors*. An example would be be Ati's 5 series compared to their 4 series. Which would infer that a 750w psu would continue to be adequate (given age and use) for most people going forward.

*nvidia seem to want run counter to the laws of evolution, but that's their bed and they're welcome to lay in it!
Pete J 9th May 2010, 16:00 Quote
Quote:
Originally Posted by thehippoz
...if you cut it too close and you have to upgrade later on- who's the real bozo :D
Exactly! Why try and save a few quid on a less powerful PSU when you can be confident down the road it'll handle the next generation stuff.
cybergenics 9th May 2010, 23:05 Quote
Quote:
Originally Posted by friskies
One thing we all can agree on: When a PSU is running close to it`s maximum output, the PSU fan will spin at a high RPM causing noise

Some are noisy are low RPM also, as the fan is noisy. Its not just the RPM but the design of the fan. Had an Akasa 400w once, that at idle sounded like someone blowing across the top of an empty milk bottle.
zoom314 9th May 2010, 23:35 Quote
My PC crunches away at Seti@Home and the future PC will use 3 graphics cards(three GTX 295 cards) as 470 and 480 cards don't do Seti or any other Boinc/Cuda project worth their salt. So My psus range from 850w to 900w to 1050w currently, Later on I plan on getting a 1600w Ultra X4 psu as an upgrade to one of My 3 PCs(I live in the USA), video cards and cpu overclocking take some power. So yeah for some It's a necessary evil so to speak.
Lockon Stratos 10th May 2010, 01:58 Quote
Quote:
Originally Posted by zoom314
My PC crunches away at Seti@Home and the future PC will use 3 graphics cards(three GTX 295 cards) as 470 and 480 cards don't do Seti or any other Boinc/Cuda project worth their salt. So My psus range from 850w to 900w to 1050w currently, Later on I plan on getting a 1600w Ultra X4 psu as an upgrade to one of My 3 PCs(I live in the USA), video cards and cpu overclocking take some power. So yeah for some It's a necessary evil so to speak.

generally speaking - ULTRA powersupplies should be avoided at all costs especially if you seeking to run a very high end/wattage system. they are really not that great & most of the people i know from the US dont use them either. ROSEWILL are sorta in the same boat but i hear less complaints about them compared to ULTRA.
zoom314 10th May 2010, 02:26 Quote
Quote:
Originally Posted by Lockon Stratos
generally speaking - ULTRA powersupplies should be avoided at all costs especially if you seeking to run a very high end/wattage system. they are really not that great & most of the people i know from the US dont use them either. ROSEWILL are sorta in the same boat but i hear less complaints about them compared to ULTRA.

Well lets see, Then to run 3 GTX295 video cards(Not any ATi cards, Not yet at least or any 470 or 480 cards, their worse than ATi 5800 series cards for Double Precision support) what do You suggest? Oh and It better have a power switch on the back or It's a no go here, Why? Overclocking an Asus motherboard, As It helps after a failed over clock to turn the power supply off and then on again, As I don't like pulling on a power cord any. Mind You the psu in the case now is an Enermax 1050w unit which is good enough for only two graphics cards or three If a 2nd psu for the motherboard and other components is used, Considering I want to water cool the P7P55D Pro motherboard(i5 750 cpu) which is in a HAF-932 case, So what's Your suggestion?
GiantStickMan 10th May 2010, 07:20 Quote
Like someone else said, it's not all about the wattage number, the quality of the PSU itself is a big one - it's probably the most important part of the whole system. Back when I was a kid and niave about computers I had a Pentium 3 running off some cheap Chinese no-name PSU. When it went it fried basically every component in the system. Won't make that mistake again.
zoom314 10th May 2010, 07:37 Quote
Quote:
Originally Posted by GiantStickMan
Like someone else said, it's not all about the wattage number, the quality of the PSU itself is a big one - it's probably the most important part of the whole system. Back when I was a kid and naive about computers I had a Pentium 3 running off some cheap Chinese no-name PSU. When it went it fried basically every component in the system. Won't make that mistake again.

I never said It was about the wattage, It has 117A on a single 12v rail, Which is good enough for 3 GTX295 cards with enough left over for the rest of the PC, So far there has only been one review of the 1600w X4 psu and It's Here(Which looks like a short review or a Preview maybe), If Bit-tech ever makes a review of the 1600w X4, I'll read It, Provided bit-tech ever does a review of this particular X4 that is.
Xir 10th May 2010, 09:40 Quote
Quote:
Originally Posted by Coldon
11 x 120mm fans, 1 x 250mm in my case atm
fan controller 30w per channel

Does it Hover? :D
Xir 10th May 2010, 09:42 Quote
Quote:
Originally Posted by Unicorn
I need a 1KW PSU because I'm running run a massive overclock on a quad core CPU, three dual core graphics cards, 6 GB of overclocked, overvolted RAM and two liquid cooling pumps.

Ah! so you're it, you're the guy they designed these monsters for.
GiantStickMan 10th May 2010, 11:45 Quote
Quote:
Originally Posted by zoom314
I never said It was about the wattage

And I never said my comment was in reference to yours. The someone else in this case was Lockon Stratos
Quote:
Originally Posted by Lockon Stratos
thats where your making a mistake just like any other average joe who thinks a bigger number is better - its not about how many watts a PSU can kick out - its about the quality of components that go into making it.
r0z|3o0n 10th May 2010, 13:21 Quote
I thrash my PSU.
Running an overclocked E6600, 4gb RAM, 2x320gb, 2x500gb, 1x74gb raptor, 1x128gb SSD, 3 120mm fans, a GTX275 and a 7600GS all mashed into a Gigabyte GA-965P-DQ6 which in itself is probably pretty hungry.
All that gets fed by an Enermax 485w PSU. Doesn't miss a beat (except when I do something dumb) and it's been running in this configuration, give or take a couple of bits, for a couple of years now.
[USRF]Obiwan 10th May 2010, 14:58 Quote
I have a 600Watt OCZ moduair running:

4x 500gb HD's
1x DVDw
Athlon 4800 X2 s939
128x256 LCD screen
6x Bulkin button lights
1x Custom circuit for lights
6x Fans
4x CCFL lights
1x 8800GT
Asus m2n mobo
power for WC Pump
fan controller

255W max powerdrain on the socket on full load (playing bench, running hd copy, all lights on)
zoom314 10th May 2010, 15:41 Quote
Quote:
Originally Posted by GiantStickMan
And I never said my comment was in reference to yours. The someone else in this case was Lockon Stratos

Ok, I didn't know, You're forgiven. :D
Jediron 10th May 2010, 17:43 Quote
Quote:
Originally Posted by Ghys
I used to believe 650W and up was overkill until my 500W coolermaster fried by powering 6 HDDs and the rest of my sig bellow

Now there is no way I will risk my rig again. Over power cheesecake
Ha, that has nothing to do with a underpowered PSU and much more to do with the quality of the PSU. You may be suprised, but thosen Coolermaster PSU's are not known for their top notch quality(unless maybe the expensive ones).
Futhermore it is always possible you bought by accidence a poor produkt, even today that happens, with all kind of products.

A good 500watt PSU form a good manufacturer is more then capable to run your components. You sound like someone who's care engine broke, for all the reasons but not it's horsepower and say: well, it must be too light, i need a bigger engine....lol

50% load is most optimal, but more is hardly a problem. most good PSU's deliver up to about 80 a 90% without much hassle.

http://www.silentpcreview.com/article1044-page4.html
Up to 400watt is no problem whatsoever for this PSU. That's about 440watt "from the wall", people. So a GTX470 will work flawless with it and even a GTX480 can do.

And if you take a look at this:
http://www.silentpcreview.com/article1044-page5.html

You will see that a 650watt rated PSU can manage 500watt without any problem; that's 550watt "from the wall"; minimum. 600 from the wall is no issue either.

This 850watt PSU from Seasonic can take up and over 700watt "from the wall" without any issue:
http://www.silentpcreview.com/article898-page4.html

650watt netto
51c degrees celsius
84,7% efficiency
42Dba
Arj12 10th May 2010, 19:09 Quote
Very interesting article, makes me glad I went for my PCP&P 610 watt PSU rather than a generic 800/1000w PSU!
leslie 10th May 2010, 21:31 Quote
A psu capable of running your system isn't enough and wattage ratings are worthless.


You need extra wattage for efficiency, upgrades, heat, the effects of aging, falsified wattage ratings.

Also, just because you have enough watts, doesn't mean you have enough watts where you need them. You may simply not have enough wattage on the 12v rail because many manufacturers place too much of the wattage on the wrong rails. Then there is/was the whole multiple rail phenomenon where my 550 watt quad rail psu was unable to power my Radeon 1900AIW.

Is my Pc P&C 750 watt overkill? Maybe, but I know it will be stable, run cool and last a long time.
andrew8200m 10th May 2010, 21:35 Quote
I have a 1KW psu that recently made a trade to its brother 1.2kw unit. I was at 80% and figured that runnung it at this would cause issues in the long run so added at little extra power so its now sat at 65% use. If I was to stick a 285 back in my system for physx the 1000W would be on its rear.


Andy
Star*Dagger 11th May 2010, 03:26 Quote
I wonder how many people here running at 98% of their rated wattage will be honest enough to post on their new computer when their old psu burns up.
zoom314 11th May 2010, 03:32 Quote
Quote:
Originally Posted by Star*Dagger
I wonder how many people here running at 98% of their rated wattage will be honest enough to post on their new computer when their old psu burns up.

Probably not too many I'd think.
Star*Dagger 11th May 2010, 03:37 Quote
Here are some useful links for those who want to use reason rather than ideology to pick their psu.

Reasonable wattage calculator
http://www.antec.outervision.com/

The alpha and omega of PSU reviews
http://www.jonnyguru.com/

"Why 99% of PSU reviews are WRONG"
http://www.hardwaresecrets.com/article/410/5


Enjoy!
S*D
Xir 11th May 2010, 10:34 Quote
I've never seen a PSU really fail, apart from a dorm-neighbour who had invested in a high-quality-15€ PSU
And since he was studying to become a bean-counter, he bought ANOTHER 15€ PSU afterwards. (they do come with a 2 year warranty you know)
Other than that, fans that start to rattle after some years. And my computers run for about 8 years before discarding them.
(first, then secondary, then parents) :D
I do aim at about 80% max load though...
Xir 11th May 2010, 10:43 Quote
Oh, and many thanks for the "Jonnygury" and especially "Silentpcreview.com" links!
smc8788 11th May 2010, 10:53 Quote
Quote:
Originally Posted by Star*Dagger
Here are some useful links for those who want to use reason rather than ideology to pick their psu.

Reasonable wattage calculator
http://www.antec.outervision.com/

I'm running an overclocked quad core CPU, GTX 275, 2 HDDs, an optical drive, sound card, satellite TV tuner card, and a fan controller with 4 120mm fans. I'd consider that about average, perhaps slightly above average, in terms of power draw, and according to that calculator it only uses 481W (although it doesn't seem to be very accurate - do IDE hard drives really use 9W more than SATA hard drives?).

So I'm pretty confident in the fact I'm not running at 98% load and that my HX650 isn't going to explode any time soon. So stop your PSU scaremongering, all it does is help the manufacturers of low quality, high wattage PSUs, and that's really not something we need.
wuyanxu 11th May 2010, 11:19 Quote
that Antec calculator isn't accurate. i got 687w for my system in my sig, but i am very sure instead of 8800GT (i selected it as 16x PCIe), i can run gtx260 without any problem.

i think the typical load power draw is around 60% of what it calculated, its value is to give you a recommendation on what wattage supply you should get, don't think it tells you the load wattages.
Xir 11th May 2010, 12:31 Quote
Quote:
Originally Posted by Star*Dagger
Reasonable wattage calculator
http://www.antec.outervision.com/

Gets to 312W in my system. (sig) Which has a 350W PSU.
Then again the highest i've ever measured at the wall socket was <300W (280ish)

Not bad though.

Also, for a system not unlike the "Gaming Workhorse"
i7 860 + HD5870 = 373W

Or one notch up:
i7 930 + HD5870 = 401W

So, a 500W PSU should suffice easily
Cyberpower-UK 11th May 2010, 15:15 Quote
Quote:
Originally Posted by Jipa
Please don't make statements like "50% is ideal" without proof and/or without specifying the PSU it's optimal for. Comments like that just don't serve any purpose other than lowering the general level of comments.
Have a look at most PSU spec sheets and you'll see that peak efficiency is around 50% load, hence ideal. It's been covered on both Bit-Tech and CustomPC before.
rickysio 11th May 2010, 16:26 Quote
I'm using http://www.hardwaresecrets.com/article/451

And according to Antec, my maximum draw is roughly 300W. 50% indeed! :D
Dymond 11th May 2010, 17:09 Quote
I have a friend in IT who is building a dual Fermi machine at present. He has had to get PSU's one is 1250 and one is 500 to power the new machine. OMG the cooling system he has put together is work that could pass you through an engineering degree on its own lol.

So yes I would say so. He calculated all the peak power requirements and even the 1250 didn't give a comfortable margin. Then when you think about the fact that PSU deteriorate by an average of 10% a year even when not driven at constantly high performance in overheated environments, I would say yes. Certainly you do. I use 100 watts myself for dual 5870s mainly to leave a little bit of overhead and avoid issues. It's a simple enough question to answer for yourself if you just look up the peak power requirements and do the math.
Dymond 11th May 2010, 17:18 Quote
Got to 700W for me. Considering I am thinking of adding a third 5870 and my PSU is 18months old and not one of the best I think I might swap it out before I do.
leslie 11th May 2010, 21:03 Quote
Quote:
Originally Posted by Xir
I've never seen a PSU really fail, apart from a dorm-neighbour who had invested in a high-quality-15€ PSU

I've had one fail myself (and seen more than a few others)...
It was sending 12volts down the 5volt rail in spikes.
It killed 2 cd-roms, damaged the mobo, ram and both hard drives I had, basically everything but the processor. Most was still under warranty, the rest I had connections to get replaced free.

I also had one give up under the strain of overclocking an Intel 805.


The most recent I saw was a customers Lenovo, it destroyed all but the processor and dvd-rom, the latter of which will probably be dead soon enough.
Star*Dagger 11th May 2010, 23:20 Quote
I would say that for most of the Gamers and power users on here a high quality 1,000 watt PSU is a good investment. I plan on using my 1250 in more than one machine, and when Johnny Guru says "this is the psu that superman uses" I am happy, lol.
I just cant see the need to risk my rig or have to screw around with buying a new PSU every 18 months.
Do what you like, I've been building machines for over 15 years and haven't had 1/10th the problems other builders have.

Enjoy the hobby (with high quality parts),
Star*Dagger
zoom314 11th May 2010, 23:58 Quote
Quote:
Originally Posted by Star*Dagger
I would say that for most of the Gamers and power users on here a high quality 1,000 watt PSU is a good investment. I plan on using my 1250 in more than one machine, and when Johnny Guru says "this is the psu that superman uses" I am happy, lol.
I just cant see the need to risk my rig or have to screw around with buying a new PSU every 18 months.
Do what you like, I've been building machines for over 15 years and haven't had 1/10th the problems other builders have.

Enjoy the hobby (with high quality parts),
Star*Dagger

Same here, Except It's been 18 years for Me. :D
Sloth 12th May 2010, 01:14 Quote
My system comes out at 438W minimum from that Antec calculator using 100% load, no aging. 632W at 50% aging, 100% load. Sounds like I really don't have a need for a 1000W PSU... by the time it'll need that wattage to run at 60% it'll already be so old that it'll die of age soon anyway, or new standards will mean the cables are limited. I agree with Star Dagger that it's good to buy a powerful PSU and just have it last, but there's a point where it's going too far. Much like mine, most PCs will never need 1kW regardless of age so buying one just to call it an investment is no better than buying 700-800W and saving some money. Also, the caveat is always there, buy quality not just wattage. A 1kW PSU isn't an investment if it dies after a year of running at 40% load.
devilxc 12th May 2010, 12:18 Quote
I prefer to get a better quality low wattage (relatively) than a similar priced high wattage. There no point 'gold plating' everything.
leslie 12th May 2010, 22:34 Quote
Quote:
Originally Posted by Sloth
by the time it'll need that wattage to run at 60% it'll already be so old that it'll die of age soon anyway, or new standards will mean the cables are limited..

There these wonderful things called adapter cables.
DarrenH 13th May 2010, 16:17 Quote
I'm in the market for a PSU but have gone for a quality Corsair 650 TX rather than a much cheaper 800W un-branded one. It reminds me of the school mums who drive huge people carriers for the school run!
knuck 13th May 2010, 17:26 Quote
Quote:
Originally Posted by Jediron
Ha, that has nothing to do with a underpowered PSU and much more to do with the quality of the PSU. You may be suprised, but thosen Coolermaster PSU's are not known for their top notch quality(unless maybe the expensive ones).
Futhermore it is always possible you bought by accidence a poor produkt, even today that happens, with all kind of products.

A good 500watt PSU form a good manufacturer is more then capable to run your components. You sound like someone who's care engine broke, for all the reasons but not it's horsepower and say: well, it must be too light, i need a bigger engine....lol


Excluding the bold part where you seem to take me for an idiot, I agree with you that quality should always come before power but I would still rather play safe and getting both. I will be testing a GTX260 SLI this weekend and I know I wouldn't have been able to do so with my old PSU (it's actually why I didn't try before). This is why I am glad I got an overkill one
Star*Dagger 13th May 2010, 21:38 Quote
People are just misquoting on purpose now trying to make the discussion between quality and quantity, a meme they are familiar with.
In the PSU market you can get both, like an Enermax Galaxy 1250, which has high quality components and gives you 1250 watts.
steveo_mcg 13th May 2010, 22:04 Quote
Quote:
Originally Posted by Star*Dagger
Here are some useful links for those who want to use reason rather than ideology to pick their psu.

Reasonable wattage calculator
http://www.antec.outervision.com/

Enjoy!
S*D

Over estimates my power consumption by nearly 70%. The only honest way to know your power consumption is to plug your computer in to a power monitor and use it how you normally do. Before wasting money on a 1kw psu buy a £10 monitor from maplin and see how it really pans out.

Mine for my low end system (Athlon II) is only about 120w in normal use.
Sloth 14th May 2010, 00:41 Quote
Quote:
Originally Posted by leslie
There these wonderful things called adapter cables.
What are adapter cables? All I see are crutches.

Seriously though, sucking up all my molex connectors just because I have an old power supply doesn't sound too pleasing, not from a cable management, asthetic, or feasibility perspective. While I'm thinking about it, I've never seen a SATA to 6 or 8 pin 12V adapter or anything of the "SATA to" sort. Starting to seem like they'd be more useful as newer power supplies seem to be cutting down the number of 4 pin molex in favor of SATA.
Lockon Stratos 14th May 2010, 01:46 Quote
Quote:
Originally Posted by zoom314


Well lets see, Then to run 3 GTX295 video cards(Not any ATi cards, Not yet at least or any 470 or 480 cards, their worse than ATi 5800 series cards for Double Precision support) what do You suggest? Oh and It better have a power switch on the back or It's a no go here, Why? Overclocking an Asus motherboard, As It helps after a failed over clock to turn the power supply off and then on again, As I don't like pulling on a power cord any. Mind You the psu in the case now is an Enermax 1050w unit which is good enough for only two graphics cards or three If a 2nd psu for the motherboard and other components is used, Considering I want to water cool the P7P55D Pro motherboard(i5 750 cpu) which is in a HAF-932 case, So what's Your suggestion?

what is your full system spec?

that 1050 should be plenty unless you have 20 hard drives linked up too. otherwise step up to the 1250w version if you feel its not enough, you can obviously afford it.
Lockon Stratos 14th May 2010, 01:46 Quote
& sorry for the slow reply - I dont frequent on bit-tech forums much
zoom314 14th May 2010, 02:01 Quote
Quote:
Originally Posted by Lockon Stratos
what is your full system spec?

that 1050 should be plenty unless you have 20 hard drives linked up too. otherwise step up to the 1250w version if you feel its not enough, you can obviously afford it.

No It's not the full specs, But this below is, Of course I have car repairs and a down payment on a house to save for all on $845 a month(SSI/SSP income as I'm a disabled person):
Quote:
Asus P7P55D Pro motherboard,
G.Skill 2-2GB Ripjaws DDR3-2000 Dimms(4GB total)[December 2010],
Asetek LCLC 240x120 Cooler w/2-4 Delta 120x25mm 113cfm fans(twice as big as the H50)[Aug 2010],
Intel i5 750 2.66Hz cpu,
1-BFG GTX 295 16x PCI Express Video Card w/1792MB ram(24A ea card),
2-used GTX 295 16x PCI Express Video Cards w/1792MB ram[Oct 2011 and Jan 2012],
Corsair CMPSU-450VX 450w psu(Motherboard, Drives & USB, 33A on single 12v rail)[October 2011],
Enermax Revolution 85+ 1050w psu(Video Cards only?),
HAF-932 DEMCi Dust filters[November 2010],
Coolermaster HAF 932 Full-Tower ATX case,
Atheros AR5BXB61(Super G/108Mbps) MINI pci-e card mounted on an MP2W pci-e x1 card,
WD 300GB VelociRaptor Hard Drive 2.5 Inch hdd[February 2012],
Seagate Barracuda 250GB 7200rpm 8MB Cache SATA hdd,
NEC AD-7170S Black SATA Dual Layer 18x DVD+/-RW Burner,
OEM Black SATA 52x CD-ROM drive,
HP pavilion f50 15" LCD Monitor,
Microsoft 5 Button Optical mouse,
Microsoft PS2 keyboard.

Note: I'm not a gamer, I crunch numbers for a Boinc project known as Seti@Home.
Lockon Stratos 14th May 2010, 02:25 Quote
its a damn shame to waste so much powerful hardware purely for folding or whatever, but there a such people that exist purely to throw in a ton of money, build a super computer that can bench like a real motherf**ker then dump it in the corner doing mundane tasks when their done benching it.

------

well, I think there was an artical somwhere on the site that allowed you to link 2 PSUs togther that power up & shutdown at the same time. keep the enermax. for the graphics. & upgrade the 450VX to something a little more powerfull if you see fit. because really theres no easy way out unless you do perchase the 1600watt X4 monster.

& i would be very careful if you do decide to buy the X4 because not many peoples rigs use over 1000watts of power. so it could well be a case of false advertising, the label says 1600w but it will only do 1300w before dissapearing in a cloud of smoke.

Im just trying to suggest the best method to look after your hardware because it is expensive, & i know how it feels when a PSU dies & takes stuff with it.
zoom314 14th May 2010, 02:54 Quote
Quote:
Originally Posted by Lockon Stratos
its a damn shame to waste so much powerful hardware purely for folding or whatever, but there a such people that exist purely to throw in a ton of money, build a super computer that can bench like a real motherf**ker then dump it in the corner doing mundane tasks when their done benching it.

------

well, I think there was an artical somwhere on the site that allowed you to link 2 PSUs togther that power up & shutdown at the same time. keep the enermax. for the graphics. & upgrade the 450VX to something a little more powerfull if you see fit. because really theres no easy way out unless you do perchase the 1600watt X4 monster.

& i would be very careful if you do decide to buy the X4 because not many peoples rigs use over 1000watts of power. so it could well be a case of false advertising, the label says 1600w but it will only do 1300w before dissapearing in a cloud of smoke.

Im just trying to suggest the best method to look after your hardware because it is expensive, & i know how it feels when a PSU dies & takes stuff with it.

I do play some Civ 4 from time to time(Otherwise I don't feel like It), Browse the net, do email, sometimes some editing of pictures and listen to My music on My PC, In addition to the number crunching of course. Yeah running two psus at the same time one for the video cards(Enermax) and the other(Corsair) for the rest of the stuff is only cause the Corsair has only one 12v rail and not multiple ones like on the Enermax, There is a cable to allow one to hook two psus together as the green wire and a black wire by a small adapter cable is connected to the 2nd psu(Enermax) while everything else is powered by Corsair psu, You press the power button for the Corsair to on and the Enermax is also powered on at the same time too. Money is limited, Besides I do have a couple other PCs, One is in case the lamp in the TV burns out as It's an HP Media center with an 850w Corsair psu and needs to be replaced(about a $91 part) and then there's the one I'm typing which is a QX6700 B1(ES, circa October 2006!) cpu with a 900w OCZ psu @ 3.42GHz, the ram there is at 427MHz/533MHz(effectively 854/1066MHz or 4:5) And It's water cooled w/a Corsair H50 and a pair of Delta fans(129cfm/113/cfm 120x38mm & 120x25mm). Oh and I have the intake for the H50 filtered as It's a Dusty area here.
knuck 14th May 2010, 03:30 Quote
Quote:
Originally Posted by Star*Dagger
People are just misquoting on purpose now trying to make the discussion between quality and quantity, a meme they are familiar with.
In the PSU market you can get both, like an Enermax Galaxy 1250, which has high quality components and gives you 1250 watts.

No. I was defending myself.
zoom314 14th May 2010, 08:31 Quote
Quote:
Originally Posted by Lockon Stratos
its a damn shame to waste so much powerful hardware purely for folding or whatever, but there a such people that exist purely to throw in a ton of money, build a super computer that can bench like a real motherf**ker then dump it in the corner doing mundane tasks when their done benching it.

------

well, I think there was an artical somwhere on the site that allowed you to link 2 PSUs togther that power up & shutdown at the same time. keep the enermax. for the graphics. & upgrade the 450VX to something a little more powerfull if you see fit. because really theres no easy way out unless you do perchase the 1600watt X4 monster.

& i would be very careful if you do decide to buy the X4 because not many peoples rigs use over 1000watts of power. so it could well be a case of false advertising, the label says 1600w but it will only do 1300w before dissapearing in a cloud of smoke.

Im just trying to suggest the best method to look after your hardware because it is expensive, & i know how it feels when a PSU dies & takes stuff with it.

Oh and It's not a waste, I don't know If You know this or not, But Boinc is able to use some gpus to crunch with as well as cpus, Unlike Folding Boinc will launch as many apps as the client has hardware for, currently It's limited to Nvidia gpus, ATi is able to do useful work, But not on all projects as the projects all have their limits in terms of talent, equipment and funding. In any case It's time for Me to get some shut eye as I'm very sleepy now.
smc8788 26th May 2010, 12:48 Quote
I thought this might be interesting for those wondering about load power consumption with multiple Fermi cards:

http://www.youtube.com/watch?v=7epu4oEQVR4
infekted.one 21st January 2011, 10:45 Quote
Quote:
Originally Posted by Cyberpower-UK
I've always found the Extremeoutervision PSU calculator to be a good starting point: http://extreme.outervision.com/psucalculatorlite.jsp it recommends 558W for a system like this, if you take ageing into account and put it in a fairly restrictive case, then put the PC under a desk and the desk in the hottest room in the house on the hottest day of the year and 550W will not be enough and you'd risk it burning out during a long gaming session, take ageing into account and it gets worse.

This site recommended a 1073w and minimum 1021w and I im using 850w thats got to be wrong!! :S
Flanananagan 21st January 2011, 12:43 Quote
Last post: 26th May 2010, 11:48

Your post: Today, 09:45

Seriously?
infekted.one 21st January 2011, 14:19 Quote
yes
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