PC Processors

[linxiaopi]

I just installed a Ryzen 5 7600 CPU and am running a CPU stress test (C-Ray, 5k). All cores are at 100% load. The core temps are mostly in the 30s C. However, one core is at 60 C. That's a 30 C difference between the coolest and hottest core. The next hottest is at 40 C. I understand that 10 C difference between cores is normal, but 20 to 30 C seems way off.

I am using a Thermalright Peerless Assassin Cooler with the provided TF7 thermal paste, which I spread with a spreader, so I know I got full paste coverage on the CPU.

I returned my first 7600 for the same issue, but the replacement is behaving the same. Is this normal or am I just having bad luck?

Here's a screenshot of the temps and CPU load:

The left window shows the 12 threads at 100% load with a dip between stress test runs. The right window shows a graph of the 6 CPU core temps and current, min, and mx temperatures for each core on the right panel. CPU 3 is the hot one, although CPU 2's temp never goes below 41 C at idle, so I'm a bit concerned with that as well. The rest of the cores (including 3) hover around 30 - 34 C at idle (not shown here).

[FunkZ · Accepted solution]

What software is displaying those core temperatures?

It shows 5 of the cores min/max only 1-2°C variance, and 1 core min/max 13°C difference.

It is highly unlikely those are accurate running a 100% load.

Have you tried Core Temp or HWiNFO?

[linxiaopi]

Thanks for your input!

I'm using Mission Center to display the load, and Psensor to show the temps. These are Linux software. The 1-2 C min/max difference is probably because I started the monitor after the benchmark had already started. The 13 C difference is on the core that is running way hotter, and the min temp may be reached when between when between benchmark runs.

I agree that the min temp diff is suspicious as they should probably drop more than 2 C between runs as well.
I'm going to reapply thermal paste and try again. If I don't see a difference, I'll install windows and try HWiNFO and/or Core Temp.

[linxiaopi]

I ended up installing Windows 10 and using HWiNFO as you suggested. It turns out that my monitoring software (Psensor) in Linux wasn't displaying the core temps correctly. HWiNFO showed all the cores heating up to within 10 C of each other at load.

Thanks for your input and suggestion!