Why is the computer dying?

Question

Iron

A strange phenomenon, the computer freezes, but the last image remains, the cursor and the keyboard do not respond, the speaker is silent, only a reboot helps, in manual mode, the Windows were changed, the hard one was checked, the memory was also checked, there is still an SSD, but everything is clean there, the capacitors are on mother and BP are normal, there are no visible damage or leaks. the temperature during the AIDA64 test does not rise above 69 degrees, freezes begin on a warmed-up computer, after about 1 hour of work.

Answer 1

69 degrees is too much. Looks a lot like overheating