Bought an OCUK '4.8Ghz' chip, can barely get to 4.6Ghz.

Mr Krugga said:
Run IBT with maximum RAM used if you don't have time or can't be bothered to wait.

Instability can cause chip degradation.

I agree with Justintime, if you're not stress-testing properly, why bother at all?

Some rigs can run for days stable and will crash at some point but the point of stress testing is to minimise the probability of having an unstable system.
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IBT / Lynx is rubbish for Sandy Bridge. Prime Blend is the best test in my experience.
 
Find this to be very true as well. IBT is good for max heat finding and thats about in on SB, my pc passed 100 runs at max and 8 threads 4.8Ghz at 1.33v and 5Ghz 1.365v but fails blend with BSD or workers stopping up to 1.375v 4.8ghz, 1.385v sorted that. 5Ghz is likely 1.4v+ terrority and i'm not going there.
 
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Don't get me wrong, when I had my QX9650 IBT great, it's just not for Sandy. Probably because of the IMC.
 
"Joxang", I'd definitely try a higher Vdimm of about 1.68v just to see if there is a RAM issue. Your ram timings, I assume are 9,9,9,24 so, maybe try CR2 (2T)

I realize this is basic stuff but I've just got thru a linx session by setting up my overclocked 980x and, after a failure, set the ram volts (timings the same) right up to 1.7 and passed LinX 20 passes.

I'm not promoting stability here, just that it might help.
 
well mine passed 7 hours prime blend stable @4.4GHz 1.250v. awesome i thought. loaded steam, went to download my games and BSOD :( think these chips are very temprimental.
 
Are you guys sure it isn't something else causing the instability? I run my system at the very lowest voltage I can get prime stable and I've never had any crashes during normal use.

Edit: koooowweeee, what games cause BSODs for you on that overclock?
 
Phenomenologica said:
Are you guys sure it isn't something else causing the instability? I run my system at the very lowest voltage I can get prime stable and I've never had any crashes during normal use.
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not sure, but if i set everything to auto then it works fine @ 4.4GHz so there must be something im missing that ASRocks tool does.
TBH even on auto the vcore doesnt go over 1.32v and the temps are pretty much identical (although today everything is about 2-3c hotter as the room is 4c warmer :( )
 
Phenomenologica said:
Are you guys sure it isn't something else causing the instability? I run my system at the very lowest voltage I can get prime stable and I've never had any crashes during normal use.

Edit: koooowweeee, what games cause BSODs for you on that overclock?
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Maybe you should upload screens of your bios to show your settings it might help them get stable.
 
I think sandybridge is very poor indeed exspecially all those BSD's problem lately. I never had any BSD with Bloomfield. A biggest mistake upgrade from i7 920 to i7 2600K surely ?
 
bulldog147 said:
I think sandybridge is very poor indeed exspecially all those BSD's problem lately. I never had any BSD with Bloomfield. A biggest mistake upgrade from i7 920 to i7 2600K surely ?
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Huh? I find oc'in easier than Bloomfield, no BSODs or anything once the rig is properly set up. There is nothing inherently wrong with Sandybridge and if you don't have a stable rig any platform can BSOD.
 
Sandybridge is very poor indeed? Almost everyone can overclock it from 3.3 at stock to 4.5Ghz stably. It's possible to push them up past 5Ghz if you get a good chip. What's so poor about it? :confused: If you're getting random BSODs due to the overclock all you have to do is nudge the voltage up 0.005 and see if it helps, it's pretty quick!
 
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