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How to Overclock the Intel Core i5-2500K

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Cei 7th January 2011, 13:46 Quote
Nice to see EFI finally being used, no more wall of bright blue! Took their time though, Apple have been using EFI since 2006, and even HP were using it back 2002 for Itanium 2.

Plus that's a tasty OC. Hope the rest of SB is this good, or is this the standout CPU?
Claave 7th January 2011, 14:12 Quote
wuyanxu 7th January 2011, 14:17 Quote
how's this new load-line calibration implemented?

with i7 860, it's horrible and very unreliable. it sustains voltage at what you've set in the BIOS, however, due to Intel's design spec, voltage drop should be expected. so, when try to overclock the 860 with turbo mode v2 enabled, you will get random crashes when running single or multiple threaded applications. end of the day, disabling LLC and sticking to Intel spec is the best way forward.



other useful piece of information you could have included in this great article is how to test turbo mode stability. i found running overnight loops of CPC benchmark works great, because it have a lot of different processor load levels to test all possible cases.
Margo Baggins 7th January 2011, 15:22 Quote
I have differing understandings of Vdrop and Vdroop...

Vdrop = The difference between voltage set in the bios and the actual voltage - loadline calibration makes the actual voltage match that set in the bios.

Vdroop = the amount the voltage drops as the processor comes on to load.

These are definately two different things, as i have done hard mods for both of them in the past.
robump 7th January 2011, 15:30 Quote
That efi on the asus look pretty nice!! Bit of a difference from the old bios!
Xir 7th January 2011, 16:07 Quote
With your Overclock, is "Turbo-boost" still enabled?
(In other words, doe the CPU still ramp down when idling, and Up when needed, just to a higher level?)

Secondly, if I look for an Overclock WITHOUT touching the Voltages...I might probably just as well go with the on-motherboard-auto-overclocking-features, such as the Turbo-Key-II on the Asus, right?
If not, what would be a recommended stable overclock without touching the voltages?
wuyanxu 7th January 2011, 16:34 Quote
Quote:
Originally Posted by Margo Baggins
I have differing understandings of Vdrop and Vdroop...

Vdrop = The difference between voltage set in the bios and the actual voltage - loadline calibration makes the actual voltage match that set in the bios.

In my experience, loadline calibration also reduces Vdroop and eliminates Vdrop. What I don't understand is that both are pretty much constant for each motherboard, so why can't people simply set a higher VCore in BIOS?

Intel spec does allow for some Vdrop and Vdroop, if those motherboards are outside that spec, then they will not be on the shelves.

Not following design spec by eliminating Vdroop when the processor is underload will result in unstable half or lightly loaded processor, Due to turbo boosts.
DbD 7th January 2011, 16:46 Quote
Nice guide, I'll keep this handy for when I get my hands on a cpu :)
Margo Baggins 7th January 2011, 16:53 Quote
Quote:
Originally Posted by wuyanxu

In my experience, loadline calibration also reduces Vdroop and eliminates Vdrop. What I don't understand is that both are pretty much constant for each motherboard, so why can't people simply set a higher VCore in BIOS?

Intel spec does allow for some Vdrop and Vdroop, if those motherboards are outside that spec, then they will not be on the shelves.

Not following design spec by eliminating Vdroop when the processor is underload will result in unstable half or lightly loaded processor, Due to turbo boosts.

I completely agree :) I was refering to the article where it states some people wrongly refer to it as Vdroop - when in my experience, that is Vdroop. I think i misread it or the article is slightly misleading there in terminology - but is no biggy :)
bogie170 7th January 2011, 16:59 Quote
Where and when can we buy these processors? I cant find them anywhere.
Fingers66 7th January 2011, 17:03 Quote
Quote:
Originally Posted by bogie170
Where and when can we buy these processors? I cant find them anywhere.

Everywhere. Monday.
bogie170 7th January 2011, 17:36 Quote
Even McDonalds?!!
SaNdCrAwLeR 7th January 2011, 17:39 Quote
even in the garbage bin behind that italian restaurant over there! *points*
bogie170 7th January 2011, 17:44 Quote
Thanks for info i'll keep my eyes open on monday!
Fingers66 7th January 2011, 17:48 Quote
Quote:
Originally Posted by Fingers66
Everywhere. Monday.
Quote:
Originally Posted by bogie170
Even McDonalds?!!
Quote:
Originally Posted by SaNdCrAwLeR
even in the garbage bin behind that italian restaurant over there! *points*
Quote:
Originally Posted by bogie170
Thanks for info i'll keep my eyes open on monday!

:D

To elaborate, try the following places on Monday...

CCL Online
Scan
Overclockers
Aria
Novatech
Yoyotech
Ebuyer

...and compare the prices. Don't forget to include the delivery options when comparing.
mecblade 7th January 2011, 18:01 Quote
*sighs at a fellow southamptoner's comment*
frontline 7th January 2011, 19:58 Quote
Quote:
Originally Posted by Fingers66
Quote:
Originally Posted by Fingers66
Everywhere. Monday.
Quote:
Originally Posted by bogie170
Even McDonalds?!!
Quote:
Originally Posted by SaNdCrAwLeR
even in the garbage bin behind that italian restaurant over there! *points*
Quote:
Originally Posted by bogie170
Thanks for info i'll keep my eyes open on monday!

:D

To elaborate, try the following places on Monday...

CCL Online
Scan
Overclockers
Aria
Novatech
Yoyotech
Ebuyer

...and compare the prices. Don't forget to include the delivery options when comparing.

Not at dabs.com then? :)
ChromeX 7th January 2011, 19:59 Quote
Quote:
Originally Posted by REVIEW
As such, much more acute 10KHz (0.1MHz) adjustments

10KHz isnt equal to 0.1 MHz :P good review though, glad to see the premium boards arent as expensive as I feared. Come payday its a 2500k and a asus mobo for me :D
frontline 7th January 2011, 20:03 Quote
murraynt 7th January 2011, 20:54 Quote
UD3 at 99 pounds looks very tasty.
rayson 7th January 2011, 21:48 Quote
i can't find **** in southampton really are there any pc parts store in southampton
Fingers66 7th January 2011, 22:21 Quote
Quote:
Originally Posted by rayson
i can't find **** in southampton really are there any pc parts store in southampton

You could always slum it and go to Portsmouth...

http://www.novatech.co.uk/novatech/hdoutlets.html#portsmouth
Ljs 7th January 2011, 23:17 Quote
Thanks guys, excellent resource!
Fingers66 7th January 2011, 23:45 Quote
Quote:
Originally Posted by frontline
Not at dabs.com then? :)

I used to buy a lot from Dabs but since they got bought by BT in 2006, their prices haven't been the best.

I still compare their prices but I haven't found a reason to buy from them for a few years.
Emil 8th January 2011, 00:08 Quote
Quote:
Originally Posted by Fingers66
:D

To elaborate, try the following places on Monday...

CCL Online
Scan
Overclockers
Aria
Novatech
Yoyotech
Ebuyer

...and compare the prices. Don't forget to include the delivery options when comparing.

Why Monday. Aria already have them listed and in stock
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