Just an update to my previous post. Since my theory was that the CPUTIN sensor was causing ASUS to overvolt and overclock when temperatures were high - I figured the best thing I could do is try to undervolt the CPU.
I was already using a -10 offset in the PBO2 curve optimiser, but I decided to also try just a negative offset to VDDCR (CPU voltage). I set an offset of -0.0875 since I saw someone else mention using that.
For reference, the full BIOS adjustments I've made:
Regular PBO is disabled, and nothing else has been changed. I also didn't add any MHz to PBO2 in the setting, it's still set to 0.
Booted up and did some testing. I don't wanna jinx it since it's only been running for a little bit, so I can't fully confirm yet if it's stable, but I have done a couple Cinebench runs and played some Hitman 2.
So a quick temperature comparison:
Low intensity tasks (like writing a post here):
Browsing the web with multiple tabs etc:
Playing Hitman 2:
Playing GTA IV:
Windows Defender full scan:
Across the board it's definitely made a big difference to temperatures, but in some areas more than others. GTA IV seems badly optimised and still runs ridiculously hot. Windows Defender peak temperatures are still ridiculous, but the average temperature is literally 10C lower, a huge difference. Low intensity stuff like web browsing sees a similar ~10C drop.
What's interesting too is that I ran Cinebench R20 (both single and multi core) and Cinebench R23 (just multi-core).
Previous scores were:
(I'm aware these scores aren't amazing for a 5950X, even after the changes - but since it's still lightning fast I'm happy with them and have no intentions of RMAing just for hopes of winning the silicon lottery and getting a better chip.)
So as well as lower temps I'm getting better performance. That might be because of PBO2/curve optimiser though and not the additional voltage offset I applied. Perhaps best of all, my fans aren't having to spin up as much so my PC is mostly staying close to silent. (This was what was annoying me before more than the temps themselves, since I'm aware AMD has said these temps are safe)
If you're still struggling with the temps, might be worth trying a small negative voltage offset to VDDCR and seeing if that helps. Just be sure you know how to clear CMOS on your board in case you set it too low and it's unstable.
I might try a bigger one like -0.1 instead of -0.0875 if this is still running stable after a day or two, but for now I'm happy to at least not be seeing sustained 80C temps anywhere anymore.
Instead of offsetting VDDCR, you should play with TDC and EDC within PBO2 settings.
Also, try negative 10~12 for the 4 best cores, negative 15 ~ 20 for the remaining cores in the optimizer setting.
I was having the same issues 5950x with Aorus Extreme x570.
I set CPU VCORE to Normal Keeping 1.2V
Dynamic Vcore to -0.1.000v
PBO to Enabled
Now getting Idle temps 43-45c and max temp 80c gaming arround 65-75c
I checked mine. One photo with default settings in BIOS and the second photo with only PBO enabled. I didn't change anything regarding the voltage etc. I still waiting the stable MSI BIOS with AGESA 22.214.171.124 to try the undervolting guide. For now I am still in the version ComboAm4v2PI 126.96.36.199 Patch C.
Well bellow 85c it's still really good to me when we talk for the 5950x. I saw a big difference after I changed my motherboard without a doubt.
@CalinB You may be interest on checking this.
Any idea regarding the following?
I tried to use PBO settings that mentioned by this guy on this video. After I did that the PBO didn't work because I could see my cpu frequency stable at 3.4GHz without any auto boosts or changing. Then I reverted to the stock settings by load optimized defaults and I only changed again the option PBO to Enabled and my RAM in XMP.
After I reboot now and even if I reset bios to default, reflash again the BIOS, having Windows 10 power plan profile to High Performance, I can see my some cores of the cpu in idle reduced to 2.9GHz, 3 and 3.1GHz. This wasn't happening before and it was always at 3.4GHz.
But the weird thing is that after using a music software that for some minutes making some process and use CPU a lot, now the single core speed reached 5.3GHz. Check the cores in the photo. I don't really know what's happening here.
Any idea guys? Everything else in BIOS is in Auto settings as always was. Thanks in advanced.