Question PC randomly restarts while gaming after swapping my motherboard, CPU and PSU

[Gaff1]

You weren't running the "large FFTs" test though. The Large FFTs test "stresses memory controller and RAM". A half hour isn't really much of a test either. Several hours would be more conclusive. I test for at least 3 to 4 hours.
As KingLoki suggested try running HWiNFO64 and getting a screen capture of what it reports for your voltages, CPU speeds, FCLK, memory clocks, CPU/DRAM voltages then posting it here. You might have to take two screen caps to get everything.

im pretty sure i did run large ffts, also i dont have time to leave it running for 3 to 4 hours, max would be 1 hour.
i will do it again tomorrow with hwinfo

 

[80251]

Gaff1 your output didn't look like the output from the LargeFFTs Prime95 test. I've got an older version though. The test will literally use 95% of your RAM. The below is what it should look like: