Windows 8.1 Intel Core i7-3770 3.40GHz Gigabyte B75M-D3H mobo Corsair CX600M 600W power supply Zotac Geforce GTX 770 4GB (ZT-70304-10P) @ 344.65 driver Stock everything no overclocking ^ I just upgraded my video card & PSU to the CX600M and GTX 770 shown above. Since then I've been getting random restarts while playing Skyrim. These are hard reboots, not driver failures. (I turned off Automatic Restart, and there's no bluescreen -- PC just shuts off.) At first I suspected overheating, so I took some GPU-Z logs of the crashes (see below). GPU temp is <50°C. Power consumption is also <40% of TDP. This seems quite modest. Yet my PC dies regularly after 10-30 minutes of playing. Log #1 - https://gist.github.com/anonymous/1bbdf93366995fd0712e Log #2 - https://gist.github.com/anonymous/6548bdd9f8ebbc2b3c9b Log #3 - https://gist.github.com/anonymous/70338d6ff2633b82fdb9 (Skyrim @ 2175x1527 DSR, Ultra settings, hi-res texture pack) I tried swapping in my old GTX 650 and it runs fine for hours with no crashes. But that doesn't necessarily mean the 770 is at fault, since the power requirements are different. It could still be the PSU not putting out enough juice for the 770, right? Should I return the PSU or the video card? Both? I have another 1-2 days left for in-store return. After that I'd have to return on warranty to the mfr.