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hconel
Adept I

Expected temperature of 3960x under sustained loading

Hi there,
I have a Threadripper 3960x on an Asus Prime TRX40-Pro mobo, cooled by a Noctua NH-U14S TR4-SP3.
I have performed the 9 small + 4 big points method suggested by Noctua for the thermal paste application:

Screenshot_2020-07-27_22-59-01.png

The case has two fans at the front and one fan at the back, all 12 cm in diameter.

Yesterday, we have run ANSYS Fluent in parallel on all 24 cores for about 4 hours straight:

Ansys Fluent: Fluid Simulation Software | Ansys 
It was during mid-day, the room was air-conditioned and I guess that the ambient temperature was around 25 degrees Celcius.
AMD Ryzen Master's temperature reading was around 78 degrees Celcius during that run.
Here is a screenshot:

WhatsApp Image 2020-07-27 at 17.57.30.jpeg

My question is, is this temperature level expected? Should the CPU run cooler with these settings?

Thanks in advance,
Huseyin

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16 Replies
fyrel
Miniboss

Re: Expected temperature of 3960x under sustained loading

The temperature are fine well within the CPU range.

Curious why you are running the processor at a fixed all core clock of 4GHz though.

misterj
Exemplar

Re: Expected temperature of 3960x under sustained loading

hconel, your temperatures are looking really good considering you have an air cooler - I assume.  I have a 3970X and go higher than that, but on water AIO.  I would like to see Ryzen Master with an all core Cinebench running. I will post mine when I finish using Hyper-V.  Please describe your OC.  There is temperature head to 95C for more clock.  Enjoy, John.

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hardcoregames_
Big Boss

Re: Expected temperature of 3960x under sustained loading

78C is well below the thermal throttle so you can consider you machine to be thermally stable

i suggest testing it once in a while as thermal material can fail over a period of time

I have refurbished several video cards due to thermal throttling and I like Arctic MX-4 which does the job I want

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hconel
Adept I

Re: Expected temperature of 3960x under sustained loading

fyrel‌ I am not quite sure. The only thing I have changed in the BIOS settings was to enable DOCP. Is it not normal? What would you suggest?

misterj‌ Yes, the cooler is an air-cooler. I have seen people talking about 65C-70C on full load in some forums, so 78C became a concern to me. Maybe I should also run Cinebench but I guess that ANSYS Fluent has generated an equivalent if not some more strain on the CPU.

hardcoregames™‌ Thanks for the advice. Although it has jumped to 82C occasionally, I guess I can conclude that my thermal paste application and cooler installation were correct.

Also since you have mentioned the 95C throttling limit, I would prefer staying VERY FAR AWAY from the 90C region. Because I am planning to run this computer under these conditions for extended periods of time (maybe 7/24). Do 80C-ish temperatures become a problem in the long run then?

Thanks!

misterj
Exemplar

Re: Expected temperature of 3960x under sustained loading

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Score was 17,000.  Enjoy, John.

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fyrel
Miniboss

Re: Expected temperature of 3960x under sustained loading

It looks like the clock speed change is from Ryzen master since OC mode is showing as manual.

Should be able to just hit the reset button on Ryzen master to return it to default.

If that doesn't change then CCX numbers back to 4500 you would want to reset bios and enable the DOCP again.

misterj
Exemplar

Re: Expected temperature of 3960x under sustained loading

hconel, this is what I was afraid of!  ASUS is the worst of the MB vendors to mess with your system.  I suspect you have started an ASUS applications and it decided to under-clock your system without your permission.  It was not done by RM.  Here is my advice: Open Settings- Windows key-i- Apps and find all ASUS applications and uninstall them all-Restart-then do a Clear CMOS and do not enable DOCP.  DOCP is an invention of ASUS and no telling what is buried in there.  If XMP is available in your BIOS you can safely use that.  Now post a screenshot of RM running Cinebench R20 all core.  Yours should look a lot more lot mine.  AMD designed their processors to run at 95C and warranties them for three years.  Each user, of course, can do as they please.  I have a really good AIO cooler and seldom get close to 95C but sure have.  Ryzen takes care of itself by reducing MHz and core Voltage.  Many silicon semiconductors run at 200C with no problems - see large 2000 Ampere silicon diodes.  You also have no need for a new Thermal Interface Material (TIM).  There is  little difference between the best and the worst TIM.  As long as you do not use liquid metal or tooth paste you will be fine.  AMD recommends water cooling for Threadrippers, and if you want to go fast, you may need a good AIO.  Thanks and enjoy, John.

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hconel
Adept I

Re: Expected temperature of 3960x under sustained loading

I must admit that I have no idea about overclocking. The only reason I have turned DOCP on was to get the 3600 MHz RAM frequency, which was normally limited to 2133 MHz. I will try to make sense of what you say in your post and try them, then post an update here. Thanks!

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hconel
Adept I

Re: Expected temperature of 3960x under sustained loading

Actually I was not trying to get 4500 MHz clock speed per se. Honestly, I would prefer running at a lower overclocked frequency if that would provide a more reasonable temperature and better stability/life expectancy. I was not even able to update the BIOS version, so I will do that and post an update here as soon as I have access to the computer. Thank you!