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post #1 of 21 (permalink) Old 03-18-2019, 09:49 AM - Thread Starter
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9900K Aorus Master - Am I Stable?

Hey folks,

Trying to figure out if my OC is considered stable or not. Note that I'm not a gamer, but do need the system stable for video and photo processing (Premiere Pro, Photoshop, Lightroom).

Hardware:
9900k
Aorus Master - Bios F7
Noctua NH-D15 cooler, idle temps ~25-28c
Silverstone FT02 case
5ghz
Vcore 1.27
VCSSA, VCCIO 1.25


The following were tested and PASSED. Temps noted are peaks:
Cinebench R15 83c
Intel extreme tuner 83c
Intel Burn Test - 10 runs 4GB 85c
Realbench 8 hour stress test, 16GB ram, 94c
OCCT 4.5.1, 1 hour, CPU: Linpack, 94c
OCCT 4.5.1, 30 min. CPU: OCCT, 64 bit, large dataset, 83c
P95 v26.6 - Small FFTs - 15 mins, 96c

The only test that failed is P95 v29.4...temps immediately jumps to 100 in 5 secs and it BSODs.

Thoughts...suggestions? I know 96c is high but I don't think I'll hit that normally.

Thanks!
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post #2 of 21 (permalink) Old 03-18-2019, 03:09 PM
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It crashed ... so no? lol.

Run an AVX offset and try again.

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post #3 of 21 (permalink) Old 03-18-2019, 03:16 PM
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Did the 8 hour Realbench stress test show any WHEA errors in HWINFO64? I'm wary of an instant BSOD in Prime95 with avx. Worker fails are less severe.

Your Prime95 small ffts without avx is also far too short. That needs to be much longer.

A potentially useful test the Blender Benchmark. It uses more power than Realbench, causes a higher vdroop than Realbench, and uses AVX2. It's not as nuts as small ffts with avx so you won't hit 100C.

https://opendata.blender.org/
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post #4 of 21 (permalink) Old 03-18-2019, 03:27 PM - Thread Starter
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Quote: Originally Posted by The Pook View Post
It crashed ... so no? lol.

Run an AVX offset and try again.
I ask because I’ve read where some say to only use 26.6.


Quote: Originally Posted by Jidonsu View Post
Did the 8 hour Realbench stress test show any WHEA errors in HWINFO64? I'm wary of an instant BSOD in Prime95 with avx. Worker fails are less severe.

Your Prime95 small ffts without avx is also far too short. That needs to be much longer.

A potentially useful test the Blender Benchmark. It uses more power than Realbench, causes a higher vdroop than Realbench, and uses AVX2. It's not as nuts as small ffts with avx so you won't hit 100C.

https://opendata.blender.org/
No errors that I noticed. But I wasn’t looking for errors in hwinfo, was primarily looking for errors in Realbench.
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post #5 of 21 (permalink) Old 03-18-2019, 03:28 PM
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I don't know, check with your psychiatrist. JJ

Don't use P95 v29.4, if you want to test with P95 use 27.9. As P95 went on it started to tax things unreasonably and not a reflection of real life anyway. I also used x264 stability test.

If it's stable in everything you use, including turning it on and off and just leaving it running for a few hours without touching it, it's stable.

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Last edited by Gunderman456; 03-18-2019 at 03:37 PM.
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post #6 of 21 (permalink) Old 03-22-2019, 08:17 AM - Thread Starter
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Quote: Originally Posted by The Pook View Post
It crashed ... so no? lol.

Run an AVX offset and try again.

What does Run an AVX offset mean? Do you mean go into the bios and dial down the AVX setting? Or is this in one of the testing apps?
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post #7 of 21 (permalink) Old 03-22-2019, 08:18 AM - Thread Starter
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Quote: Originally Posted by Jidonsu View Post
Did the 8 hour Realbench stress test show any WHEA errors in HWINFO64? I'm wary of an instant BSOD in Prime95 with avx. Worker fails are less severe.

Your Prime95 small ffts without avx is also far too short. That needs to be much longer.

A potentially useful test the Blender Benchmark. It uses more power than Realbench, causes a higher vdroop than Realbench, and uses AVX2. It's not as nuts as small ffts with avx so you won't hit 100C.

https://opendata.blender.org/
Ran an 8 hr Realbench again.. no WHEA errors in HWINFO64. 87c max temps. Anything else I should check from this test before I move on? Will try the Prime95 longer w/o AVX.
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post #8 of 21 (permalink) Old 03-22-2019, 10:14 AM
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Quote: Originally Posted by ocococ View Post
Ran an 8 hr Realbench again.. no WHEA errors in HWINFO64. 87c max temps. Anything else I should check from this test before I move on? Will try the Prime95 longer w/o AVX.
are you a gamer or do you do work at your computer?
If you're a gamer, just do a 1 hour prime95 with AVX disabled test.
Download prime95 29.6 build 7 from their forums. It lets you disable AVX and AVX2 in the stress test options.
Try smallest FFT then try small FFT.

If you pass, just call it a day. No reason to test small FFT with AVX enabled at all, if you passed realbench 8 hours, unless you encode, fold or crunch numbers for a living. Trust me.
Small FFT with AVX enabled has literally a 33% current draw increase (which means MORE vdroop) than AVX disabled. A LOT more vdroop. That vdroop is what makes stable systems crash.

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post #9 of 21 (permalink) Old 03-22-2019, 10:17 AM - Thread Starter
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Zero gaming. 99% of what I do is Lightroom, Photoshop and Adobe Premiere Pro video editing, which does crank up the CPU. Do I need to do avx testing then?
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post #10 of 21 (permalink) Old 03-22-2019, 11:50 AM
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Quote: Originally Posted by ocococ View Post
Zero gaming. 99% of what I do is Lightroom, Photoshop and Adobe Premiere Pro video editing, which does crank up the CPU. Do I need to do avx testing then?
Depends on how much load those programs pull in amps.
Vdroop is directly proportional to how many amps are pulled. For example, 125 amps (real world AVX like Realbench 2.56) may drop a 1.30v with medium loadline calibration down to 1.20v, while 180 amps (typical prime95 29.6 build 7 small FFT AVX test at 1.30v with medium high LLC) will drop that 1.20v down to 1.16v. If your VMIN was 1.19v (min stable voltage), then yes, you're going to be unstable with the small FFT test.
Doesn't mean real world programs will crash.

It all depends on your workload.
some people have the mindset that "if you aren't 180 amps small FFT stable you aren't stable", and don't seem to think of the 110C temps you are also pulling to raise vcore enough to be 180 amps stable. You need to adapt to your worst case workload, have a little cushion and go from there. Now if you're running at lower clocks and volts and can run something insane like FMA3 small FFT's under 80C and still be rock stable, then you're golden. But those are absolute worst case workloads which mean nothing unless you do that type of calculation for a living or hobby.

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