Games crashing into Windows after a while

Marty34_96

Distinguished
Feb 25, 2013
25
1
18,535
Hello,
week a go, my games start crashing into windows. Games like AC Unity, FC Primal or TC Division. About Division its crash in 30 minutes. AMD crimson stops responding and reestablished again. Unity and Primal just stop responding win process, and crashed into Windows.

My specs:
WIn 10, 64bit
16gb ram patriot
psu: Corsair Gaming Series GS700 700W
Saphire r9 280x toxic

I tried format win10 and install last amd drivers. (still crashing)
I tried old stable catalyst (still crashing)
I tried take graphic card to my brother (works without problem)
I tried memtest (ok)
HDD/SSD test (ok)
Valley Benchmark 1.0 (sometimes crash during bechmark)
Furmark (30 min test, 80C temperature without crash)

Last possibility is broken PSU maybe? But only games crashing not the PC. Thanks for any advise.