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post #16581 of 22126
Quote:
Originally Posted by gabriel21st View Post

Well I did what I could in the span of a few hours and was not able to stabilize at 4.6 GHz core. Was incrementally increasing VCCIN and Vcore until I eventually reached 2.0 V input and 1.34 V core. Decided to stop there. Everything else was reset to stock (RAM, SA, etc.). I was using the x264 stress test found somewhere here on OCN, 16 threads setting. Wasn't ever able to complete one loop, the highest I got was around 14%. The encoder would either crash and/or I would get a 101 BSOD.
Maybe 4.6 is not possible for my chip. For now I reverted to my previous stable OC.

Its very possible you're past the limit. I think x264 is a good 'real world' tester of AVX and if you can't pass it then there is more work to be done.

I'm betting you can achieve AVX (possibly prime) stable 4.4GHz under 1.30v and maybe around 1.92-95 input voltage.
post #16582 of 22126
Quote:
Originally Posted by hemirunner426 View Post

You can of course do whatever suits your fancy. If you run OCCT linpack with AVX on it essentially does the same thing as prime in terms of hammering AVX. A timespan for running is a subjective matter. Its really just personal opinion.

My point is if it crashes during any sort of stress testing, its a hardware fault and its not stable. Its just a matter of time before you use an application that utilizes those instructions and it crashes as a result.
VERY unlikely to come across any app (outside computational chemistry etc) that will hammer the FPU with repetitive instruction sets (such as FMA3, AVX2 or AVX) at the level of p95 stress - Finding primes is not as stressful. p95 limits the stability "test" for most desktop rigs in that most architecture (ASIC: app-specific IC) can handle a single instruction set.. and even train to it. What trips these things up more is rapidly changing instruction sets hitting various architecture throughout the die.
I'm obviously not a fan of p95 for this purpose. wink.gif
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post #16583 of 22126
Quote:
Originally Posted by Jpmboy View Post

^^ this. p95 is yesterday's news. thumb.gif

Hello

It's not for those that don't have a clue.
post #16584 of 22126
Quote:
Originally Posted by Praz View Post

Hello

It's not for those that don't have a clue.

People that have no clue. They are the ones that really annoy me in some games. (Dirty Bomb) i enjoy playing it but not when my teammates are clueless!. sozo.gif
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post #16585 of 22126
Quote:
Originally Posted by Jpmboy View Post

VERY unlikely to come across any app (outside computational chemistry etc) that will hammer the FPU with repetitive instruction sets (such as FMA3, AVX2 or AVX) at the level of p95 stress - Finding primes is not as stressful. p95 limits the stability "test" for most desktop rigs in that most architecture (ASIC: app-specific IC) can handle a single instruction set.. and even train to it. What trips these things up more is rapidly changing instruction sets hitting various architecture throughout the die.
I'm obviously not a fan of p95 for this purpose. wink.gif

I'm not saying that p95 is the end-all-be-all of a stress tester. And no, how it hammers the FPU is not indicative of typical usage of a desktop CPU. What it does tell you is if there is instability in a particular instruction set, in this case AVX, AVX2, or FMA depending on version of p95.

All I am trying to say is if you can't pass x number of minutes/hours without a crash/lockup/BSOD running p95 then these instruction sets are not stable at whatever multiplier/voltage settings you're at. They will eventually crop their heads up using another app that utilize these instruction sets. It's either stable, or its not.

p95 is nothing more than a diagnostic tool in an array of tools available to test stability. People may say its irrelevant. I say its not, and I'll be more than happy to continue on with my p95 stable CPU.

EDIT: I don't mean to sound condescending. I love the debate, but people who discount p95 because they want their MHz over stability doesn't make sense to me.
Edited by hemirunner426 - 1/25/16 at 7:36pm
post #16586 of 22126
p95 was my stess test tool the old first gen i7... but no mas... now i use occt for that final pass of testing, i like verifying with a blend of testing
Quote:
Originally Posted by hemirunner426 View Post

I'm not saying that p95 is the end-all-be-all of a stress tester. And no, how it hammers the FPU is not indicative of typical usage of a desktop CPU. What it does tell you is if there is instability in a particular instruction set, in this case AVX, AVX2, or FMA depending on version of p95.

All I am trying to say is if you can't pass x number of minutes/hours without a crash/lockup/BSOD running p95 then these instruction sets are not stable at whatever multiplier/voltage settings you're at. They will eventually crop their heads up using another app that utilize these instruction sets. It's either stable, or its not.

p95 is nothing more than a diagnostic tool in an array of tools available to test stability. People may say its irrelevant. I say its not, and I'll be more than happy to continue on with my p95 stable CPU.

EDIT: I don't mean to sound condensing. I love the debate, but people who discount p95 because they want their MHz over stability doesn't make sense to me.

I don't think it's as cut-n-dry as you propose it to be.

p95 would overwhelm my rig's cooling system, it would either crash (most likely) or slow to a thermally throttled crawl. It would be ugly, I don't ever want to put it thru that. However, I believe the video encoders use the avx (and familily) instructions, yet my system is capable of running the x265 and x264 bench/stress tests indefinitely. Ditto occt which also incorporates avx (and familty) instructions. Those stress tests run fine for as long as i've been willing to let them run.

In my view, p95's usage pattern of specific heat inducing instructions creates an adversarial thermal environment that is not necessary or appropriate for general stability testing. My system can execute avx2 instructions just fine, but not when its at 100c.
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post #16587 of 22126
Quote:
Originally Posted by lilchronic View Post

I gets hotter when ran with GPGPU at least for me. Warning: Spoiler! (Click to show)


GPGPU bench runs a lot hotter for me too compared to the standalone Mandel test, maybe because its all warmed up from from running the whole suite instead of just the one?

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post #16588 of 22126
New CPU stock settings under 100% load. (Folding nacl) So faar so good! :-D

Core: 0.960
Cache: 0.891-0.894
VCCIN: 1.776

This might indicate that this CPU will overclock good?

Packed my old on now. Talked to Intel and waiting on their answer. Warning: Spoiler! (Click to show)

Seems like the CORE temp is not far from eachother. Been folding for only 5 mins tho. I am really really happy! The package temp is always higher than the core in my experience.
Edited by GreedyMuffin - 1/26/16 at 6:01am
post #16589 of 22126
Quote:
Originally Posted by GreedyMuffin View Post

New CPU stock settings under 100% load. (Folding nacl) So faar so good! :-D

Core: 0.960
Cache: 0.891-0.894
VCCIN: 1.776

This might indicate that this CPU will overclock good?

Packed my old on now. Talked to Intel and waiting on their answer. Warning: Spoiler! (Click to show)

Seems like the CORE temp is not far from eachother. Been folding for only 5 mins tho. I am really really happy! The package temp is always higher than the core in my experience.

Those are good temps Are you on water? If so it will take about 15-30 minutes for the system to equalize at during which you'll see slowly increasing temps.

Good temps doesn't necessarily mean you will OC well. It just means you have the temp headroom to OC well. It still depends on the silicon lottery on whether you get over the 4.5 hump.
post #16590 of 22126
Quote:
Originally Posted by hemirunner426 View Post

Those are good temps Are you on water? If so it will take about 15-30 minutes for the system to equalize at during which you'll see slowly increasing temps.

Good temps doesn't necessarily mean you will OC well. It just means you have the temp headroom to OC well. It still depends on the silicon lottery on whether you get over the 4.5 hump.

The voltages.

Well the water was warm-ish, been folding for the last week 24/7. Just turned off to switch CPU. Will report back on the final temps. smile.gif

EDIT: Gone 15 min. Same temp.
Edited by GreedyMuffin - 1/26/16 at 6:27am
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