2019 Blade 15 "Memory Management" BSOD

Without dumping too many details, I am searching for a solution to the following: laptop constantly BSODs while under load (mainly running "Valheim" with maybe 1 Chrome window open). BSOD codes that have popped are "Memory Management" and "Unexpected Kernel Mode Trap." Of note, CPU core temps were almost 100 C when it crashed. I undervolt using Throttlestop if it's relevant. Could be an entirely separate issue as I don't think running that hot is good, but may be normal for Razer.

I suspected bad RAM but have run the Windows Memory Diagnostic a number of times with no errors detected. A couple of times the diagnostic tool froze for an entire day and required a hard shutdown.

I reset Windows completely and rebooted from a backup - still no changes to this issue. Could be that my entire system backup just brought the exact same issue back.

I switched to Windows 11 a month or two ago - don't think I had any issues like this with Windows 10, but don't want to jump to any conclusions. It would be difficult to revert back to Windows 10.

Any thoughts? Is it obviously bad RAM? Should I download Windows 10 image and try that? I would appreciate any help - my limited warranty has expired.

Product Number: RZ09-02886EM2-R3U1