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Haswell Overclocking Guide [With Statistics] - Page 997

post #9961 of 19539
Quote:
Originally Posted by MLJS54 View Post

I think I may need to delid my chip...

Temps are sitting at mid to high 30s with 0 load (no EIST) on the 4670k with a H100 cooler.

Core 44x
Uncore 34x
Vcore 1.265
Uncore voltage 1.2
Eventual Voltage 1.9
Everything else on auto on ASUS Hero

(Note these are the settings I went with after about 4 hours of x264 tests.)

When I'm gaming with ~80-100% load on 1 core, temps hit high 50s/low 60s

Wonder if it could also be the H100 mounting / thermal compound Corsair uses? Don't want to rule anything out but would rather not have to re-mount the cooler again (huge PIA) and just get the Noctua that everyone seems to praise.

My delidded / lapped 4770K hits 45*C with those settings and 1 thread in Prime95 @ 100% (HT Disabled & custom loop)

With stock TIM and a H100, that sounds about right. Deliding should give you 10*C minimum. Plus the benefits multiply - at that lower temp you may need less volts, which will lower your temps some more.

Noctuas are great though.
post #9962 of 19539
Quote:
Originally Posted by Minusorange View Post

So what constitutes stability then ?

That's been a big discussion around here and on OCN, because 90% of haswell overclocks can't pass avx2 linpack

Stable for me is gaming, x264 encoding etc with no signs of instability, bsod's or whea's etc
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post #9963 of 19539
Quote:
Originally Posted by Wirerat View Post

if it were me and I bsod in a very short prime95 version 27.9 run. I would consider it not stable. That veiw varys though.

It takes about 30 mins of small before my cpu reaches max prime test temps.

I can get maybe 15 minutes max out of prime when I OC'd 4.5 @ 1.28 temps went to 85 degrees straight away which is above the 80 degree threshold I'm setting myself for the chip, Aida64 however has been running for the past 4 hours now with no issues and temps at 60 degree
Quote:
Originally Posted by Cyro999 View Post

That's been a big discussion around here and on OCN, because 90% of haswell overclocks can't pass avx2 linpack

Stable for me is gaming, x264 encoding etc with no signs of instability, bsod's or whea's etc

So is prime just for extra verification that it's stable beyond regular limits ? Kind of like the way aircraft constructors will build the wings on a plane and test to go higher than rated safety tolerances ?
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post #9964 of 19539
Quote:
Originally Posted by Wihglah View Post

My delidded / lapped 4770K hits 45*C with those settings and 1 thread in Prime95 @ 100% (HT Disabled & custom loop)

With stock TIM and a H100, that sounds about right. Deliding should give you 10*C minimum. Plus the benefits multiply - at that lower temp you may need less volts, which will lower your temps some more.

Noctuas are great though.

What are the exact settings for your prime95 test? I'd like to see the delta of my chip vs. yours (accounting for your real loop / delid).

Also, 4770k naturally run a little bit hotter than 4670k? Or is that only the case with HT on?
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post #9965 of 19539
Quote:
Originally Posted by MLJS54 View Post

What are the exact settings for your prime95 test? I'd like to see the delta of my chip vs. yours (accounting for your real loop / delid).

Also, 4770k naturally run a little bit hotter than 4670k? Or is that only the case with HT on?


Torture test, small FFTs, 1 thread.

Turning off HT reduces mine by about 4*C
post #9966 of 19539
Quote:
Originally Posted by Wihglah View Post

Torture test, small FFTs, 1 thread.

Turning off HT reduces mine by about 4*C

Does it make a difference to stability testing on 1 thread as opposed to 8 threads ?
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post #9967 of 19539
Quote:
Originally Posted by Minusorange View Post

Does it make a difference to stability testing on 1 thread as opposed to 8 threads ?

Oh yes. much easier.

But it does simulate a single threaded game
post #9968 of 19539
Quote:
Originally Posted by Wihglah View Post

Oh yes. much easier.

But it does simulate a single threaded game

Could that be why I was having bsods then as I was running the test on all 8 threads ? Would you recommend using less threads and would it still count as pass even if it fails higher threads ?
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post #9969 of 19539
might grab another 4770k and a maximus VI extreme/formula/hero for a new build soon, lets see if i can get a third haswell to 5.0 tongue.gif
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post #9970 of 19539
Thread Starter 

Stability means not crashing too often for you when you're using your computer the way you use it. That is my opinion. If you do BF4, it needs to be BF4 stable. If you do Prime on your leisure time, it needs to be Prime stable. You might feel one bsod every year is too many bsods. Or you could even stomach one bsod a month or a week or every other minute. As long as you're fine with the stability, it's fine. If you're not fine, it's time to adjust. And if you don't adjust, clearly the instability isn't bad enough to get you to go out and fix the issue.

 

If you have 4770k and you plan on using HT, then yes, I feel you ought to test with HT on. If you buy a 4770k and don't use HT, you should've just bought a 4670k. So I would say that if you have a 4770k you should stress with HT on. I also feel that stressing with all cores should be the standard when testing stability. You didn't buy a 4 core processor to use 1 core only, did you? Then test all four cores.

 

Test what you're going to use. If you have 4770k it is obvious you will be using HT and 4 cores. So you have to make sure both of that is stable.

 

Some people complain that they pass this many passes of this one stress test and crash while gaming or something. The best way to know that you won't Bsod in BF4 is to play BF4 for hours on end. If you don't Bsod, then you won't bsod. Converting things like "1 hour Prime stable" to "How many hours BF4 stable?" is rough and inaccurate. And it's not like stressing with BF4 or rendering or whatever you do is wasting time. You're playing your game, you're doing what you normally do, just testing the CPU as a bonus.


Edited by Darkwizzie - 2/12/14 at 1:53pm
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