Hello,
I'm currently trying to fix one of my mate's computers. The only games that he's playing atm are World of Warcraft and Overwatch. When his OW used to crash, an error message saying: Rendering device has been lost. used to pop up. After a clean OS installations, during both of these games, he seems to be getting random freezes. His pc becomes unresponsive and he needs to reboot it in order to work. When I had the PC at my place, I was able to play for 2 days without a single crash, but when I gave the pc back to him, on his second day he got one freeze and the next day there were 4 crashes within an hour. I've already tried to talk to Blizzard tech support and they said that the issue is definitely on my side.
His rig is
Intel i5-3570
Asus P8Q77-M
Gigabyte GTX 650Ti
Seasonic S12II-520W
2x 2gb Kingston DDR3 ram
1x 4gb Corsair RAM
Thank you