Specs
CPU: i7-3770k
GPU: AMD Radeon HD 7790
Mem: 2x Corsair Vengeance DDR3 4Gb
Mobo: ASUS P8P67 LE
PSU: Kingwin MK-650W

PC black-screens shortly after launching most games, trying to narrow down which components (or software) could be causing the issue.

It's crashed on the following games: The Forest, Overwatch, World of Warcraft (very shortly after launch, sometimes I can't even select a character before a black-screen and restart), and Earthlock. Earthlock can be played for a relatively longer period of time before the crash. Big Pharma doesn't appear to crash the PC at all (I played for almost an hour plus before I exited and went to sleep).

Things I've tried:
- Updating graphics driver
- Reseating the graphics card
- Launching games in safe mode + networking (this seems to work although I'm not sure if it's because the issue with a driver or the greatly lowered performance prevents something else from tripping up)
- Installed GPU monitoring software (not really noticing anything I would consider anomalous behavior before a crash. GPU temp rises but I'm attributing that to launching a game)

I'm thinking that it might be a driver issue (due to everything working in safe mode) or a power supply issue (my current one is several years old and it might not have been the best quality in the first place).