Increase RAM timings.

Here’s the basic tests to run, one of them will show you what the problem is

• https://memtest.org/
• sysbench memory
• sysbench cpu
• stress-ng
• gpu-burn

This article will give you the details on how to use most of them: https://www.fosslinux.com/42630/best-cpu-stress-test-performance-benchmark-linux-tools.html

Be to do them in that order, you don’t want memory issues to show up looking like cpu issues, or cpu issues to look like gpu issues.

Could be oom? How much ram do you have and is it filling up?

That could be a failing power supply. Excessive ripple under heavy load can cause a hard lock up.

First try to reliable reproduce it if possible, perhaps with a stress test app. Or start with memtest.

Just about every freeze I’ve had on Linux in more than a decade has been a GPU driver problem, even when it seems to be processor related.

What does it do when it freezes? Screen suddenly gets stuck, crashes to black screen, different color screen, etc?

On top of the other suggestions here, upgrade your bios. We really need to know exactly what you mean by freezing though.

Update your microcode for your CPU, and then cold boot.

It’s been a minute since i fixed it, but i was having similar problems on Mint with nvidia. The fix for me was swapping de. If you have the option, maybe give it a try.

Sorry i don’t have more details. I’m on a whole different distro nowdays.