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9700k over 200W with AVX

 
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post #1 of 6 (permalink) Old 01-01-2020, 05:47 PM - Thread Starter
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9700k over 200W with AVX

I'm working on overclocking my 9700k and I can get 5ghz stable on Prime95 without AVX no problem, however I have problems with AVX. With AVX, I'm hitting over 250W total usage and my CPU is throttling from VRM power according to Intel XTU, temps are about 100C on the hottest core.
This is all with the auto voltage setting on my motherboard. I think I should probably try to stay under 200W total CPU power, but to do that with AVX, I need to run at 4.6ghz which seems low for this CPU.

Non-AVX Prime95 hits 75C on the hottest core and about 170W of CPU power.

Do you guys just not worry about Prime95 AVX loads since they are not realistic? I don't really want to set an AVX offset since games use AVX. I also don't want to ruin my Mobo or CPU by running it at 250W of power.

Do you consider it stable if it passes Prime95 Small FFTs non-AVX fine at 70C with no errors and just ignore AVX results?

Mobo: ASRock Z390 Phantom Gaming 6
Cooler: EVGA CLC 240mm
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post #2 of 6 (permalink) Old 01-01-2020, 05:57 PM
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sounds about right. Cinebench R20 uses AVX/AVX2/AVX512 and @ 4.8 1.25v I draw 280w from the wall on my 9900K measured with a Kill-A-Watt.

run an AVX offset if you want but I don't. if you never use anything that uses AVX2 instructions then I'm not really sure why you're bothered with testing it though.

I don't even run Prime95 on my system anymore. My rig only restarts for hardware changes and OS updates, and if it's stable enough to run 24/7 and do the things I need to do without crashing then it's stable as far as I'm concerned.

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post #3 of 6 (permalink) Old 01-01-2020, 06:33 PM - Thread Starter
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I occasionally use handbrake which uses AVX so I want to make sure I'm AVX stable.
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post #4 of 6 (permalink) Old 01-01-2020, 10:24 PM
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Maybe check voltage and llc settings? I looked at my prime 95 low voltage runs and am pulling 122W without avx and 151W with (Lvl 2-3 avx offset I think). 9700k @ 5GHz, vdroop -25% (z390 dark), Vcore override 1.15, vid usually shows 1.21. When voltages where higher I was pulling a lot more W. Vsa and vccio as low as you can go and a lower avx offset might help too!


Last edited by boostedevo; 01-01-2020 at 10:29 PM.
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post #5 of 6 (permalink) Old 01-01-2020, 11:03 PM - Thread Starter
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I think I could pass without AVX at 1.15v, but 1.15v with AVX will definitely bluescreen. I need like 1.35V to do AVX at 5ghz.
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post #6 of 6 (permalink) Old 01-06-2020, 08:33 AM
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Ur wasting ur time with p95 an avx my recommendations stick with rog bench which uses avx moderately.

I cant wait for avx512 on mainstream cpus and watch ppl failing badly at it trying to feed 1.3-1.4mV at 50x that would be funny xD

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