Sign in with
Sign up | Sign in
Your question
Solved

I need help overclocking my i5 2500k from bios (p8z68-v pro)

Last response: in Overclocking
Share
December 13, 2011 9:05:33 PM

I just bought an aftermarket heatsink - the Hyper 212 - and I am trying to OC. This mobo is confusing as hell and I am lost.

Any suggestions as to how I should go about it - what steps to take?

Thanks a lot. I really appreciate any help.
Related resources
a b K Overclocking
December 15, 2011 1:43:30 PM

also check out overclock.net and other such communities, they have all sorts of primers for people starting out which are very helpful, and they have a huge following of people to help answer OC specific questions, where most of us here on Toms know more about general hardware issues.
m
0
l
a c 197 K Overclocking
December 15, 2011 2:42:14 PM

Also look at Ryan's guide:
http://www.tomshardware.com/forum/266189-29-sandy-bridg...

CaedenV said:
also check out overclock.net and other such communities, they have all sorts of primers for people starting out which are very helpful, and they have a huge following of people to help answer OC specific questions, where most of us here on Toms know more about general hardware issues.

Speak for yourself. :) 

The regulars here are just as good. And some of us have been doing this a very long time.
----------
Overclocking since 1978 - Z80 (TRS-80) from 1.77 MHz to 2.01 MHz
m
0
l
December 15, 2011 8:21:49 PM

jsc said:
Also look at Ryan's guide:
http://www.tomshardware.com/forum/266189-29-sandy-bridg...


Speak for yourself. :) 

The regulars here are just as good. And some of us have been doing this a very long time.
----------
Overclocking since 1978 - Z80 (TRS-80) from 1.77 MHz to 2.01 MHz


You know what? I didn't have a problem overclocking, after all.

I set my CPU ratio to 44 and upped the voltage to 1.3, but when I would run CPU-Z it would still only show 3.30GHz and 1600MHz. Once I figured out that I have to run CPU-Z while my CPU is under load, I downloaded Prime95 and voilà, 3.30GHz and 4.38GHz underload.
m
0
l
a b K Overclocking
December 15, 2011 9:01:14 PM

You do know you need to stability test with prime right? The vcore is a bit high for 44. Either raise the multiplier or lower the vcore til it's unstable. I'm guessing you're using fixed vcore. You can try offset vcore if you want your vcore to change when in idle vs load.
m
0
l
December 15, 2011 9:38:58 PM

k1114 said:
You do know you need to stability test with prime right? The vcore is a bit high for 44. Either raise the multiplier or lower the vcore til it's unstable. I'm guessing you're using fixed vcore. You can try offset vcore if you want your vcore to change when in idle vs load.


I ran IntelBurnTest 10 times on high, and passed. I ran Prime95 for a few minutes and the highest it went was 75. It idles at 35.
m
0
l
a b K Overclocking
December 15, 2011 10:31:10 PM

While you are figuring out your best OC, a few minutes is fine but once you settle on what you think is best you need to run a couple of hours. I would suggest the length of your gaming session: say if you game for 4 hours than test for 4 hours. Or if you're like me and renders so stability is important, run it over night. It may pass a 1 hour test then crash 1 min after.

And again 1.3v is a bit high for 44.
m
0
l
December 15, 2011 11:11:31 PM

k1114 said:
While you are figuring out your best OC, a few minutes is fine but once you settle on what you think is best you need to run a couple of hours. I would suggest the length of your gaming session: say if you game for 4 hours than test for 4 hours. Or if you're like me and renders so stability is important, run it over night. It may pass a 1 hour test then crash 1 min after.

And again 1.3v is a bit high for 44.


Thanks.

I went ahead and set the voltage to auto and dropped the OC down to 40, so now I am getting about 4150MHz under full load (no need for anything more at this point, I can already max out all my games). Using a sandy bridge i5 and a hyper 212 I don't figure there is a need for any tests at that OC, especially considering I have 4 fans in my case and the air flow is so good I have to dust everything out every other day.
m
0
l
a b K Overclocking
December 16, 2011 2:50:07 AM

Auto overvolts even more. And no matter the speed, you still stability test, it's not about temps, it's about stability. Honestly, my i5 is stock and games are still maxed, I only load the oc profile when I render. I would undervolt but my mobo won't allow it. If you want the lowest vcore oc, change your offset to -.05 and you should probably hit 40-42. Proper overclocking is getting the lowest voltage with the speed you want.
m
0
l
December 16, 2011 6:52:22 AM

k1114 said:
Auto overvolts even more. And no matter the speed, you still stability test, it's not about temps, it's about stability. Honestly, my i5 is stock and games are still maxed, I only load the oc profile when I render. I would undervolt but my mobo won't allow it. If you want the lowest vcore oc, change your offset to -.05 and you should probably hit 40-42. Proper overclocking is getting the lowest voltage with the speed you want.


Thanks for your help. I will try lowering the voltage and see if I can maintain my current OC.

I ran Prime95 and the temps shot up to about 80 fairly quickly. I am not worried, though. First, I ran IntelBurnOut on high 10 times, and I passed. Then, I settled in and ran RealTempGT and CPU-Z in the background while running several of my most demanding games - in windowed mode and in full screen - for several hours (from about the last time I posted until now), the CPU was at full force (I actually jumped it back up to 4.3GHz) the entire time. I spent about 2 hours in Crysis: Warhead (Maxed out, full screen), and when I was through running it, I checked RealTempGT - the temp NEVER went above 63. That was the highest it has gone all night. It occurs to me that the Prime95 is much harder on my CPU than anything modern games will throw at it.

I think I am good to go. :p 
m
0
l
a c 145 K Overclocking
December 16, 2011 10:45:59 AM

Here's my initial "1st day" numbers (Core 1, Cores 2, Core 3, Core 4) on my son's box w/ a Thermalright Silver Arrow w/ fans at lowest possible rpm.

Stock 51,53, 53, 51 (1.224) LLC = Auto
4.0 Ghz 52, 54, 55, 52 (1.016-1.024) LLC = Auto
4.2 GHz 54, 56, 57, 55 (1.256 - 1.264) LLC = Auto
4.4 Ghz 56, 60, 60, 67 (1.280 - 1.288) LLC = Auto
4.6 Ghz 62, 66, 68, 65 (1.360 - 1.368) LLC = High
4.8 Ghz 71, 77, 79, 72 (1.408 - 1.416) LLC = Ultra High*

That's w/ HT enabled on the 2600k....turning off Hyperthreading @ 4.8 dropped the temps by 7-10C. I have all the above profiles saved in the BIOS but the "standard" boot is the 4.6 ..... temps are a bit lower now that TIM has "broken in".

Here's some guides ..... I used the 1st one:

http://www.hardforum.com/showthread.php?t=1578110
http://www.clunk.org.uk/forums/overclocking/39184-p67-s...
http://www.tomshardware.com/forum/264397-29-asus-mother...
http://www.xtremesystems.org/forums/showthread.php?t=26...

m
0
l
December 16, 2011 11:20:08 AM

JackNaylorPE said:
Here's my initial "1st day" numbers (Core 1, Cores 2, Core 3, Core 4) on my son's box w/ a Thermalright Silver Arrow w/ fans at lowest possible rpm.

Stock 51,53, 53, 51 (1.224) LLC = Auto
4.0 Ghz 52, 54, 55, 52 (1.016-1.024) LLC = Auto
4.2 GHz 54, 56, 57, 55 (1.256 - 1.264) LLC = Auto
4.4 Ghz 56, 60, 60, 67 (1.280 - 1.288) LLC = Auto
4.6 Ghz 62, 66, 68, 65 (1.360 - 1.368) LLC = High
4.8 Ghz 71, 77, 79, 72 (1.408 - 1.416) LLC = Ultra High*

That's w/ HT enabled on the 2600k....turning off Hyperthreading @ 4.8 dropped the temps by 7-10C. I have all the above profiles saved in the BIOS but the "standard" boot is the 4.6 ..... temps are a bit lower now that TIM has "broken in".

Here's some guides ..... I used the 1st one:

http://www.hardforum.com/showthread.php?t=1578110
http://www.clunk.org.uk/forums/overclocking/39184-p67-s...
http://www.tomshardware.com/forum/264397-29-asus-mother...
http://www.xtremesystems.org/forums/showthread.php?t=26...


Thanks a lot. Looks like it will be helpful.

Have you ever used an i5 2500k? And if you have, did you notice a difference between the i7 with hyper-threading and the i5 2500k?
m
0
l
a b K Overclocking
December 16, 2011 2:44:33 PM

nice guide jsc
m
0
l

Best solution

a b K Overclocking
December 17, 2011 3:35:22 AM

With HT off on the i7 or with the i5, they will both get similar lower vcore vs HT enabled. 4.6ghz is usually around 1.3v. Prime does stress the cpu more than regular software which is why it is used for stability testing.
Share
December 17, 2011 1:38:02 PM

k1114 said:
With HT off on the i7 or with the i5, they will both get similar lower vcore vs HT enabled. 4.6ghz is usually around 1.3v. Prime does stress the cpu more than regular software which is why it is used for stability testing.


Hey thanks for all your help, man. I really do appreciate it.
m
0
l
December 18, 2011 10:10:56 PM

Best answer selected by PcGamer81.
m
0
l
!