Overclock stable, but not when gaming...

Roverno

Roverno

Roverno

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Hi all,

I have overclocking my 2500k in sig below and was running 5GHz on 1.425V, that was fine for 20 mins but not overnight so i clocked back to 4.9 and reduced voltage to around 1.408v. That was stable for an overnight run of prime 95 blend test but when i was playing diablo i got blue screen with error 0x124. As far as i know that means i need increased Vcore, why on earth would it be able to run prime for hours but not be capable in gaming??

What is going on here?
 
The overclock was not for diablo, it just so happens that it crashed while i was playing it. I just wanted to clock my CPU as high as i could really now that i have watercooling, and for some reason 5Ghz just took my fancy.

EDIT: I understand 5Ghz is not necessarily achievable with every chip, but why would it be fine on prime but not on gaming?
 
Durzel said:
Extra load from graphics card causing voltage dip? I've heard some people talk about running Furmark and Prime in tandem, brutal!
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I did run both for a bit but it only used 16% Gpu so i thought it would be fairly pointless, perhaps not, will try again.

Justintime said:
What version of prime95? Anything under around 27.4 can test falsely positive for SB and onwards as it dosen't use AVX extensions.
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Turns out im running v25.11. That should probably be my first port of call. I have heard OCCT is quite good, or AIDA64. Would you recommend p95 though on new version?

Justintime said:
Also forgot to add, i've noticed prime failing at 13-16hrs on a regular basis with the newer versions, usually 101 or 124 BSODs, so an overnight or 8hr run just dosen't cut it imo.. many will moan but overclocking takes patience. 24hrs seems to be a good indicator and haven't had a rig fail at anything once that is passed.
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I personally like taking time over it, but mates been heckling me for a week to play diablo lol. Just tried some stuff to see what would happen.
 
Justintime said:
Er.. thanks. To be specific, it can be related to Vcore, Vtt, Vdimm and PLL up or down, 90% vcore but not always and adding more vcore may not be necessary, you can tweak the LLC to compensate for vdroop.
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I did know most of this but i have just thought about my RAM. I have hyper x grey which i have had running at 1600 on 1.5v for a while but in this new board maybe it wont work quite so well? I should perhaps push that voltage up a bit as that would explain the crash in game?
 
Well i got a lot more debate than I bargained for there, but it gives me plenty more information about these stability testers and heat output etc.

I was well aware that overnight wouldn't really be enough of a test but i have been fairly busy so just wanted some results. I will just wait in the future and OC when i have sufficient time to do so.

Plus i will remember to get the newest versions of software in the future (idiot :()


Thanks again everyone for the assistance.
 
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