I'm at a loss. The gaming PC I built this summer has never worked the way it should, but it's steadily gotten worse. Current state is that it works mostly fine for everything but gaming. Whenever I start a game, I'll usually be able to play for 3-4 minutes and then I'll be thrown to desktop after losing display output for a few seconds. The game will still be running in the background (sounds continue playing), but I won't be able to switch back. Then after a couple of seconds the game crashes completely. Windows will still be running just fine, no system crash or BSOD. From time to time I will lose display output for a few seconds while just browsing the web or whatever - monitor goes black, then comes back. No error messages.
Steps I've tried:
Specs:
AMD - Ryzen 5 1500X 3.5GHz Quad-Core Processor
Asus - PRIME B350-PLUS ATX AM4 Motherboard
Corsair - Vengeance LPX 8GB (2 x 4GB) DDR4-2400 Memory
Sapphire - Radeon RX 580 8GB NITRO+ Video Card
[strike]Corsair - VS 550W ATX Power Supply[/strike]
Edit: PSU replaced, now Corsair RM550x - no change.
Steps I've tried:
completely removed and re-installed GPU drivers
run all updates on Windows and the games in question
monitored GPU and CPU temperatures (no spikes or overheating)
updated BIOS
completely re-formatted drive and re-installed Windows
Specs:
AMD - Ryzen 5 1500X 3.5GHz Quad-Core Processor
Asus - PRIME B350-PLUS ATX AM4 Motherboard
Corsair - Vengeance LPX 8GB (2 x 4GB) DDR4-2400 Memory
Sapphire - Radeon RX 580 8GB NITRO+ Video Card
[strike]Corsair - VS 550W ATX Power Supply[/strike]
Edit: PSU replaced, now Corsair RM550x - no change.