Ryzen 3600 PRIME95 AVX Workload Insane Temperatures

[Jarrod]

Hi all,

Recently grabbed myself a 3600 - applied a modest 4.2 all core clock at 1.275v using a high airflow case with a Arctic Coole 34 Duo installed.

Temperatures during AIDA64 stress are around 74c. In games is around 55-60c. All fine there.

However, Prime95 will reach 90c fairly quickly, within 10 minutes. If I disable AVX workloads within Prime, I'll get around 74c. My question is - why? Is there something I'm missing with this? My friend has a 3600 at the same frequency/voltage, but under a H100 kit, and his Prime95 with AVX workloads hit 74c max.

Very strange! Is it simply a matter of my cooler not being sufficient to deal with that workload at these frequencies/voltages?

Thanks for any help!

 

[Jarrod]

You have a decent mid sized cooler
He has an AIO
Nothing surprising there

That simple you think? I'd expect a 8-10c difference though.. not 20c+. You could be right, it just seems too far off to me?

 

[Jarrod]

I would say that seems a bit off also. That cooler is pretty good, and actually performs better than a H100i in a review.

For you I would suggest a re-mount with fresh paste. Also make sure your fans are ramping up with the temperature sufficiently.

Yep so did a full re-mount last night with MX-4 paste. Both CPU fans are ramping up to 2100 RPM under load. They're orientated correctly (push,pull). Seems odd.

 

[Jarrod]

What voltage are you running out of interest?

One of the differences may be if your friend is using his radiator fans as intake fans, he's getting cooler air straight onto it helping temperatures which I find does help quite a bit. What case are you running with and case fan setup?

So I'm running at 1.275v. In regards to intake, I have 3x intake at front of case, 2x exhaust at top, 1 x exhaust at back, and the two cpu coolers in push-pull exhausting out the back.

I have taken the side panel off to see if it was an airflow issue, but no change to temps whatsoever practically.

 

[Jarrod]

Part of the problem could well be too many intake fans. As a rule a case is cooler inside if you have more exhaust capacity than input capacity. Pushing large amounts of air in is only of benefit if you are pulling even larger amounts of air out.

Hmm maybe - but with the side panel off I get roughly the same temperatures

 

[Jarrod]

Something wrong here.... 54c Gammaxx L120 Deepcool.

Curious, my CPU is pulling 85W compared to your 41W....

 

[Jarrod]

That is odd. try the one i linked.

Same version I have... just re-downloaded from that link to make sure. But same thing. Small FFT with AVX Workloads... instant 90c with 88W power draw... wonder why my CPU is reportedly drawing nearly double the wattage as yours?

 

[Jarrod]

Small FFT, AVX was on in the last one and is in this...

And thats with another air cooler right? Surely this Arctic Cooler 34 isn't THAT BAD that I'm gettng an additional 20c on a lower voltage than yourself? Also curious, the cpu doesn't throttle itself even at 95c.... frequency and voltage remains the same...

 

[Jarrod]

During any other benchmark, I get around 74c max. Games 50-65c. Prime95 without AVX is 74c max. Just so curious that AVX kills it completely

 

[Jarrod]

AVX is just like that when used in stress testing software, i don't know why, its just one of those things, Intel guys also use AVX offsets to stop their CPU's from melting in stress test software.

It seems to be a thing, i wouldn't worry about it, as long as its fine in day to day software, which it seems to be just put it down to AVX doing what it does when use like this, like everyone else does....

I guess - not experienced a particular "workload" to make that much difference to temps before - but I also haven't done any tinkering with PC parts in 5 years or so. Guess I'll elave it as it is, thanks though everybody!

 

[Jarrod]

Just thought - one thing about this cooler, a fair bit of the CPU IHS is still visible after installation. Arctic have said this is fine. But I wonder is there anything AVX related on the outside towards the edge of the IHS? Complete guess, but possible maybe? Maybe someone who knows what they're talking about can chime in!

 

[Jarrod]

Hi all - just an update for anybody who happens to stumble across this post. I ended up installing a Arctic Freezer Liquid 2 240mm - Prime95 with AVX at 4.2Ghz now toppign out at 69c. Happy days - will return the Arctic Cooler 34

Thanks for help everybody

 

[Jarrod]

Had a feeling it was just too much for
Your cooler
AVX is very stressful

I still can't believe how stressful AVX is!

 

[Jarrod]

Well, I ended up with a brand new CPU, I accidentally ordered two Ryzen 3600. I thought I'd swap them out and see how the unused one performed. I'm now running 4.3Ghz at 1.21v (drops to 1.2v under load), maxing out at 81c under a 10 hour prime 95 AVX small fft. Happy with that!

 

[Jarrod]

That's a pretty good clock for a 3600, mine needs 1.325 just to hit 4.2 but only maxes out at 67c in aida and cinebench r20 with the wraith prism cooler. I haven't tried prime as I didn't want to blow up my CPU bearing in mind my vcore is quite high.

Yea I'm happy with it to be fair, I max out at 68 in Aida, but fans on the radiator are vey quiet, so I guess they're set to quite a quiet fan profile