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The Big Air Cooling Investigation

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DBA 10th February 2012, 20:39 Quote
This! this is the kind of articles that you only find on Bit-tech and what most of us came to read! First time in a long time I have read the whole article. Great work, guys!

I would however like to know where the side panel fan sits according to the GPU and CPU. You could eventually swap out the pic of the red fan, with one of the notorious side panel fan?
Also it would be interesting to see what effect the removal of the 3,5" bays would have?
Material 10th February 2012, 21:01 Quote
Quote:
Originally Posted by Gareth Halfacree
The one exception I've found is if you use filters on your fans. Set the case up with negative pressure, and you'll find every little hole in your case gets furry over time. Use positive pressure and the filters catch the muck.

This is of course very true, and for the sake of a few degrees, you may well be better off using positive pressure. It all comes down to what is important to you really.
J Sabo 10th February 2012, 21:27 Quote
Will really help me out on my First Build
Gareth Halfacree 10th February 2012, 21:46 Quote
Quote:
Originally Posted by Material
This is of course very true, and for the sake of a few degrees, you may well be better off using positive pressure. It all comes down to what is important to you really.
Plus how often you can be bothered to vacuum...
Valinor 10th February 2012, 22:01 Quote
Quote:
Originally Posted by maverik-sg1
So which is more efficient for cooling a case with positive pressure or a case with a negative pressure?

Also, with all these high end air coolers around (efficient and quiet) the question has to be asked....is water cooling dead?

Except for sandy bridge e, perhaps. And the people who want to go "yeah, I've got watercooling!" and then spend 10 minutes explaining that the water doesn't cause short-circuits because it's sealed. I'd agree that air coolers have become more effective, so water cooling may be used less.. Who knows?
Ficky Pucker 10th February 2012, 22:16 Quote
great article !

as Fractal R3 owner i found the "best" fan setup is 2 x 1450 Gentle Typhoons at front of the case and 1 1450RPM GT on roof (Back).

i don't have a fan on the rear of the case as it makes no difference in temps (i have 2 fans on my Venomous X so that probably helps :p)
TheDarkSide 10th February 2012, 23:13 Quote
Great article!

also gotta remember that one of the best air cooled cases out there is the FT02, a positive pressure case, so it's not always the case that negative > positive, it all depends.
Waynio 11th February 2012, 02:41 Quote
Quote:
As we said, we’re confident these principles will hold true for the majority of you but, as ever, the best thing to do is experiment and see what works for you, your fans and your case. Now, if you don’t mind, we’re off for a well earned beer.

:);) Good principles too. :D

Decent article
MorpheusUK 11th February 2012, 08:19 Quote
Loved the read, great article. I have one query, if removing hot air is better than pumping in cooler air, I would be interested to see a 3 fan setup, rear, side and front, with the front in reverse being used as an exhaust. Just me thinking out the box (I know that was a weak joke), but would be interesting to know the results.
Jehla 11th February 2012, 10:30 Quote
Any thoughts or opinions of the use of conduit to channel the air to the CPU?
longweight 11th February 2012, 10:42 Quote
I really don't think that will help unless you have a case with bad air flow. Would be interesting to see some tests though!
T2I3M 11th February 2012, 11:13 Quote
I have recently purchased an R3 due to all the positive reviews, and i was wondering what was the best fan layout! Good article.
stoff3r 11th February 2012, 14:15 Quote
Great read! thanks ! :)
Matticus 11th February 2012, 15:39 Quote
I am using a Lian Li A05nb, so obviously not a normal cooling setup, I also have 2x12cm fan grill cut in the roof which further adds to the mix. From reading monster threads and doing my own testing, my dual roof intake nets the best results for my graphics card and the A05nb's back to front cooling works well with my CPU which has a megahalems sitting on it.

I was debating moving back to my R3 because I wanted a bit more silence and possibly another few hard drives internally. After reading this I am dying to give it a go, I just need to go back to my parents and grabbing it from the loft :) My only issue is with my megahalems in place, the side intake seemed a bit pointless as it was basically blowing half of its air a few mm's straight onto the top of my cooler :/
dunx 11th February 2012, 17:25 Quote
I just bought an Antec P280 ! And my third GTX 460 started to fry ( even with a fan on a rope aimed at it ! ).

I put the card into my HTPC and it's fine ( 59 C @ 98% load ).

So how large an effect does the orientation of the graphics card make to cooling ?

I am wondering if "raising" the centre card with a PCI-E cable will allow more air to circulate.

Thanks for a great article, I have all six fans as exhaust, leaving air to enter the rear grilles as needed.

dunx

P.S. Four NMB 120x38 server rack fans to play with today !
Fizzban 11th February 2012, 17:52 Quote
What a brilliant article, thank you!
GoodBytes 11th February 2012, 17:56 Quote
Quote:
Originally Posted by dunx
I just bought an Antec P280 ! And my third GTX 460 started to fry ( even with a fan on a rope aimed at it ! ).

I put the card into my HTPC and it's fine ( 59 C @ 98% load ).

So how large an effect does the orientation of the graphics card make to cooling ?

I am wondering if "raising" the centre card with a PCI-E cable will allow more air to circulate.

Thanks for a great article, I have all six fans as exhaust, leaving air to enter the rear grilles as needed.

dunx

P.S. Four NMB 120x38 server rack fans to play with today !

Can you show a picture of your case inside?
Splooshiba 11th February 2012, 18:44 Quote
great article, especially useful for me with an R3. turns out i have a middle-ish efficient cooling setup because i blocked my side vent off for quietness
mikewd 11th February 2012, 18:49 Quote
BRING BACK THE 38mm case fan!
PingCrosby 11th February 2012, 20:01 Quote
Enjoyed that, I'm a fan.
dunx 11th February 2012, 21:11 Quote
No... it's work in progress, as I hate the way the GPU power leads are routed... looks way too messy
I have removed the "hot" GPU as I need it running 24/7, and 87 degrees was way too hot.
I guess being upright is far better for cooling a GPU ? as in my HTPC where it is 27 degrees cooler.

dunx

P.S. It's sat at CPU 64 / GPU1 54 / GPU2 49 and Google will show you the massive space inside, my P6T6 WS looks lost in there...
dunx 11th February 2012, 21:31 Quote
Actually I have quite a pile of scrap acrylic here... I wonder if building an air-con conduit fitted with a server fan to blast the GPU's with fresh air ? One benefit of a comically large PC case !

dunx
Taniniver 11th February 2012, 22:00 Quote
Quote:
Originally Posted by do_it_anyway
...My only problem is that on my Antec 902 with a titan fenrir cooler, fitting a side fan causes it to hit the CPU cooler...

I have a similar problem with my Antec P190 and a ThermalRight Ultra 120 eXtreme. I found with a bit of fiddling though I was able to mount the 200mm side intake fan on the OUTSIDE of the case (still acting as an intake), and even keep the filter on it too.

Not ideal of course since it looks a bit odd, and I wouldn't do it if there was anyone around who might stick their fingers near the unprotected fan blades, but for me it works well and helps to keep the graphics cards cool.
dunx 11th February 2012, 22:24 Quote
Perhaps someone should play with a CFD package...

dunx
John_T 11th February 2012, 22:29 Quote
Quote:
Originally Posted by PingCrosby
Enjoyed that, I'm a fan.

http://www.youtube.com/watch?v=bcYppAs6ZdI&feature=fvwp&NR=1 :)

It was a great article - cheers!
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