Description of the Issue:
About a month ago I started to have some issues running certain games. When I started them up the screen would go blank (Monitors reported nothing was connected) and then eventually the computer would just restart. It originally started with everything locking up and I would have to perform a manual restart. Example (Overwatch works fine and the new Warcraft 3 crashes immediately.
Computer Specs (Built 5 years ago):
CPU: Intel Core I7-5820K 3.30GHZ
Memory: Kingston HyperX Predator T2 16GB
Motherboard: ASUS X99-A ATX LGA2011-3
Video Card: ASUS Radeon R9 390
Case: Antec Twelve Hundred 1200 V3
PSU: Corsair AX760 760W ATX 12V V2.31
Eliminated software problem by reinstalling both working and nonworking games and the issue persisted. Went as far as wiping the drives and reinstalling windows, but same issue.
Thought about overheating so I used compressed air and cleaning off everything. I do have NZXT Sentry 3 5.4-Inch Touch Screen Fan Controller and it keeps temps between 30-60 degrees and I've never received alarms.
GPU tested using Heaven Benchmark. Ran it for about 30min, temperatures stayed normal, didn't notice any display issues (stuttering or such).
Last test I did was using FurMark and it crashed and rebooted about 30 sec after starting it.
Just wondering If anyone can provide some advice or thoughts for next steps. I think it might be the PSU, but I wanted a second opinion before buying hardware. Any help would be greatly appreciated.