I recently bought and installed a Sapphire R9 390 Nitro in my system as my GTX 660 was getting up there in age. The phyisical installation went smoothly, drivers installed fine (or not, still not sure on that), but every time I go to play a game, my PC restarts itself. This only happens with newer games, (Killing Floor 2, Battlefield 4, GTA V, and the like) Not dated titles like Fallout 3.
I've tried rolling drivers back to 15.15 and still no luck, is my card bad or are there just problems with the drivers that AMD hasn't addressed yet?
Motherboard: Biostar TA970
CPU: FX 4100 Quad 3.6GHz
GPU: Sapphire R9 390 Nitro
PSU: Rosewill Capstone 750w 80+ Gold
Windows 7 Ultimate 64bit
8gb DDR3 1600 RAM