i5 2500k + Asrock z68 overclock help

minefields · 9 Aug 2011 at 19:32

Hi, i just recently purchased the following:-

Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor
Asrock Z68 Extreme4 z68
Kingston HyperX Genesis Grey 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz
Akasa AK-CCX-4002HP Venom CPU Cooler

I have used the asrock auto overclock settings in the bios but cannot get it past 4.2, anything more and it BSOD with error code 0124 with a few seconds/minutes of running prime95.

When i did a prime95 on the 4.2, temps only reached 60c at most, so I think there is still some room in there for more than 4.2.

Should i switch to manual OC in the bios and if so how would i go about changing the values? or is there a few settings i can change while in auto mode that will help me get 4.4 at the minimum or hopefully 4.6.

Thanks in advance

Dean

welshdragon · 9 Aug 2011 at 19:42

Odd, this probably isnt very helpful but I have an i5 and that board and get 4.6 using the auto feature. You running the latest bios, not sure if that would help or not. should be 1.6 I think.

minefields · 9 Aug 2011 at 19:44

Yeah i updated to 1.6 as soon as i got the board, this is what confuses me is that everyone else seems to get at least 4.5 very easy.

Update :-

Changed the load line cal form auto to level 4, (it was on level 5 before) ran at prim95 large fft at 4.6 or around 30 mins with no problems, longest i have achieved before a BSOD. Temps were at max 68c and vcore was hovering aorun 1.39 on cpuz.

Dropped it back to 4.4 and max temps are around 64c at 1.344 vcore on prime95 large fft, still no BSOD. I think i may keep it at 4.4 for the time being and see how it goes.

Is 68c too hot under prime95 load or does that seem pretty good?

Flying_Hellfish · 9 Aug 2011 at 22:48

4.4 does seem to be a nice 24/7 overclock on these chips.

You may be able to tweak a little more to get the voltage down, but the temps look fine.

Deluxe1 · 9 Aug 2011 at 23:00

Is this the same BSOD you get?

Ive just got the Asrock Z68 Extreme4 Gen 3 and having abit of bother trying to get my system stable.

minefields · 9 Aug 2011 at 23:19

Yeah i think it was the same, all the minidumps came out as a 0x00000124 bug check code.

Since changing the load line cal to level 4, i have not had a BSOD at 4.4ghz and didn't for the time i had it set at 4.6ghz.

I did read that the 124 error code is to do with the VTT voltage or the vcore, not sure on that though.

Now i have got the vcore down to just under 1.3v at 4.4 by reducing the voltage on the DRAM to 1.55v as i read a lot of people don't recommend 1.65v for sandybridges