Super Odd 3950X Behavior (Very Low Temps - Air Cooler)

[rmartin558]

So I am at a loss, heres the situation:

I have a relatively new build running 64 GB of ram at 3200 Mhz, a Aorus Pro Wifi ITX X570 Board, and a 3950x with an NH-U12A, I have not Overclocked at all and PBO is sitting at Auto, ambient temperature in my office is 19-20C. I have not de-lidded my CPU or used liquid metal or anything, I am using the stock thermal paste from the cooler (lame I know).

1) Since I am planning on swapping out the motherboard for a full ATX Board (want more PCI slots) I decided to do a little testing beforehand, I downloaded Prime-95 and I run Small FFTs on the CPU, Task Manager shows things maxed our on all threads and frequencies range from slightly below base to the high 3000's. This all feels like pretty normal behavior but, in HWInfo (looked at Ryzen Master too) my CPU (which idles in the 40s typically) is sitting at 58-62C at full load, now I did find that it I let things run long enough there would be the odd infrequent spike up to 70ish C but, still these temps seem too *low*?

2) My first thought was that maybe the temperature sensor is broken, however this does not seem to be the case, the computer is throwing off very little noticeable heat . . . I've built plenty of PC's that throw heat off like a space heater and this is just not doing it . . . 

3) My next thought was to run some benchmarks to see if something is wrong with the CPU, a stress test could hypothetically still push a broken CPU to 100% load even though the CPU performance is not actually at the level it should be. However, when I run Geekbench 5 scores seem very reasonable (and temps again barely pass 60C) compared to what I am seeing online, I pulled up Cinebench R20 and had the same situation even after running the benchmark around 15 times in a row consecutively temps max out at 63-64C and scores are all in the mid 9000's.

I know that it sounds stupid to complain about *low* temperatures, but I am very confused . . . the NH-U12A is good but, its not a D15 or a DRP4 temps seem too low and I am wondering if something is wrong or if I am just missing something completely.

Anyone experienced something like this or have any ideas?


 

[DailyProcrastinator]

Welcome to the forum!

 

Use HWMonitor64 instead of HWinfo. Go from there, but I mean low is good Ryzen LOVES cool temps.

 

EDIT: Disregard, forgot what I was referring too. 

[rmartin558]

Behavior seems the same, very odd not sure if anything here stands out to anyone!

Thanks for the warm welcome!

[nick name]

9 minutes ago, TheDailyProcrastinator said:

Welcome to the forum!

 

Use HWMonitor64 instead of HWinfo. Go from there, but I mean low is good Ryzen LOVES cool temps.

Hello and welcome.

 

We don't recommend Hwmonitor for anything Ryzen.  Please don't listen to that advice.  Use HWiNFO.

 

If  @rmartin558 is running at speeds in the 3.8GHz range then the CPU is probably not using much voltage and the temps make sense.  Especially with a 20*C ambient.  Again, don't use HWmonitor with Ryzen.  Use HWiNFO.  

[GhostRoadieBL]

noctua thermal paste is actually pretty good, same stuff they sell separately so no worries there. 

everything there looks normal, package power is scaling up like it should, actually looks like you got a really solid silicon lottery chip that runs cool at full load. nothing really standing out. 

[rmartin558]

1 minute ago, nick name said:

Hello and welcome.

 

We don't recommend Hwmonitor for anything Ryzen.  Please don't listen to that advice.  Use HWiNFO.

 

If  @rmartin558 is running at speeds in the 3.8GHz range then the CPU is probably not using much voltage and the temps make sense.  Especially with a 20*C ambient.  Again, don't use HWmonitor with Ryzen.  Use HWiNFO.  

Thanks for the advice, I now have both on my PC and they are giving me the same numbers so right now doesn't seem to make a huge difference, I've used HWiNFO in the past just because I am more familiar with it and it feels a bit more powerful to me.
 

1 minute ago, GhostRoadieBL said:

noctua thermal paste is actually pretty good, same stuff they sell separately so no worries there. 

everything there looks normal, package power is scaling up like it should, actually looks like you got a really solid silicon lottery chip that runs cool at full load. nothing really standing out. 

Thanks for the reply, I kind of had this in the back of my mind but the temps just seemed so low! Maybe I am missing something but wouldn't we expect the clock to automatically boost in a situation like this or is it no possible under an all core load? 

I feel kind of bad to be blessed with such a cool running CPU since I am not planning on doing any overclocking . . .

[nick name]

1 minute ago, rmartin558 said:

Thanks for the advice, I now have both on my PC and they are giving me the same numbers so right now doesn't seem to make a huge difference, I've used HWiNFO in the past just because I am more familiar with it and it feels a bit more powerful to me.
 

Thanks for the reply, I kind of had this in the back of my mind but the temps just seemed so low! Maybe I am missing something but wouldn't we expect the clock to automatically boost in a situation like this or is it no possible under an all core load? 

I feel kind of bad to be blessed with such a cool running CPU since I am not planning on doing any overclocking . . .

You can play with the PBO settings or use the EDC bug to get more speed, but you WILL see higher temps. 

 

Also sounds like a lot of that cool ambient air is making it into the case so that helps a lot.  If that room was 7*C warmer the CPU would definitely show it.  

[DailyProcrastinator]

29 minutes ago, nick name said:

We don't recommend Hwmonitor for anything Ryzen.  Please don't listen to that advice.  Use HWiNFO.

Sh!t my bad lol, I forgot which is which. 

[nick name]

1 minute ago, TheDailyProcrastinator said:

Sh!t my bad lol, I forgot which is which. 

In your defense most folks come in using Hwmonitor and we have to tell them to use HWiNFO.  So your response to recommend something else falls in-line with what we usually tell someone.  Lol.  

[GhostRoadieBL]

19 minutes ago, rmartin558 said:

 I kind of had this in the back of my mind but the temps just seemed so low! Maybe I am missing something but wouldn't we expect the clock to automatically boost in a situation like this or is it no possible under an all core load? 

that's in the "boost table" for multiple cores. basically what PBO does is check a massive chart of preferred values from AMD. 

the CPU goes "i'm running a # of my cores with temperature average X degC and power requirement % of max power Y" and the chart looks up what values it can run for power and frequency at that load, then it tells the CPU to run at whatever frequency works in that cell of the chart. 

 

you can try running 4 workers instead of all workers and see if the frequency boosts up higher. there's different frequencies for all cores, single core, 4, 8 etc which are based on other factors on the CPU including temps but also power and length of time at a specific frequency