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Haswell Overclocking Guide [With Statistics] - Page 1184

post #11831 of 19637
Just ran Intelburn test 10 pass on Very high and Prime 95 for about 3 hours. Max temp was 73°C on my 4670K 4.6ghz @ 1.25 V delidded, lapped with a custom water loop. Intelburn test passed no problem but encountered a problem on Prime 95. Worker number 2 stopped for some reason and gave an error code. Has anyone seen this before?


Edited by Shweller - 4/18/14 at 9:18pm
post #11832 of 19637
Quote:
Originally Posted by Shweller View Post

Just ran Intelburn test 10 pass on Very high and Prime 95 for about 3 hours. Max temp was 73°C on my 4670K @ 1.25 V delidded, lapped with a custom water loop. Intelburn test passed no problem but encountered a problem on Prime 95. Worker number 2 stopped for some reason and gave an error code. Has anyone seen this before?


That's what happens when you are unstable. You can go run custom fft 864k-864k if you want to reproduce it faster than just running blend again (it'd take 3 hours to come back to that fft)

Have you tried shooting for ~4.9 or so using the lower temperatures of x264 and prime fft 1344-1344?
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post #11833 of 19637
Quote:
Originally Posted by Cyro999 View Post

That's what happens when you are unstable. You can go run custom fft 864k-864k if you want to reproduce it faster than just running blend again (it'd take 3 hours to come back to that fft)

Have you tried shooting for ~4.9 or so using the lower temperatures of x264 and prime fft 1344-1344?
No I have not. I use to run 4.5 ghz 24-7 with a little less voltage stable for about 5 months. Now that I finished my loop, delid and lapping I would like to hit 5ghz. Just trying to figure out a good test. My aida 64 trial period is up. I usually run ibt and prime with some heavy bf4 gaming to check stability.
post #11834 of 19637
Quote:
Originally Posted by Shweller View Post

No I have not. I use to run 4.5 ghz 24-7 with a little less voltage stable for about 5 months. Now that I finished my loop, delid and lapping I would like to hit 5ghz. Just trying to figure out a good test. My aida 64 trial period is up. I usually run ibt and prime with some heavy bf4 gaming to check stability.

http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics/10980_30#post_21941059

use 8 threads

i also found prime 27.9 custom, fft 1344-1344 with >90% of max RAM to be quite harsh (avoiding the high temps) and hear recent versions are harder, but not much hotter, if you want a really hard test for vcore etc.
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post #11835 of 19637
Quote:
Originally Posted by Cyro999 View Post

http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics/10980_30#post_21941059

use 8 threads

i also found prime 27.9 custom, fft 1344-1344 with >90% of max RAM to be quite harsh (avoiding the high temps) and hear recent versions are harder, but not much hotter, if you want a really hard test for vcore etc.
Thank you. I will give a run and report back. I know there is a big jump in voltage once you try to get to 4.9 & 5. I will see how my loop handles it.
post #11836 of 19637
Quote:
Originally Posted by Shweller View Post

Thank you. I will give a run and report back. I know there is a big jump in voltage once you try to get to 4.9 & 5. I will see how my loop handles it.

The voltage jumps can get quite big - like 0.13v for 200mhz! - but sometimes you don't need to add as much Vcore if you also increase VRIN

I think general consensus for degradation etc is that 1.5vcore is a terrible idea, 1.3 seems completely fine and 1.4 is probably ok unless you're being conservative
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post #11837 of 19637
Thanks again Angelotti for the x264 stuff and sorry i didn't help you faster before!~

I tested 12 threads vs 16 on my system with 4c8t for 1000 frames~



This is some really solid utilization now!
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post #11838 of 19637
Thread Starter 

But temps didn't go up?

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post #11839 of 19637
Quote:
Originally Posted by Darkwizzie View Post

But temps didn't go up?

Well, i already had pretty good utilization before. At this point, my ambient temps and if the heatpipes are warm or not decide the fate of temps moreso than little tweaks - in the past, when there were gaps in utlization, they were a bit lower.

My temps dropped a little with new case and they shouldn't rise now. My average on hottest core, if i were to encode like this for 2 hours, would be about 75c @1.265vcore load, HT on

I really like x264! I'm glad performance got improved a lot with Haswell, because it's awesome to have an extremely useful, widespread, open source, as-near-perfectly-threaded-as-possible-for-an-actual-program etc thing that uncounted millions of people use, to encode and benchmark with. It's a fun benchmark to shut down people claiming FX is always faster when properly utilized, for example. 8-threaded FX cpu's have not been faster video encoders than i5 since Haswell.
Edited by Cyro999 - 4/18/14 at 11:00pm
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post #11840 of 19637
Quote:
Originally Posted by Cyro999 View Post


i also found prime 27.9 custom, fft 1344-1344 with >90% of max RAM to be quite harsh (avoiding the high temps) and hear recent versions are harder, but not much hotter, if you want a really hard test for vcore etc.

I've never used prime95 before, could you give more info please :

- number of tests to run
- check "Run FFTs in place" box ?
- about RAM you say 90%, of total ram, avalaible ? windows says i have 8133ram, avalaible 6950, free 6276, if i use 90% of 8133 i'm not sure it can go well
- time to run each FFT size ?


Thanks.
 
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