2 Month old pc started crashing on game startup

D Train

Honorable
Feb 7, 2014
9
0
10,520
I just built my first rig 2 months ago and it's worked great until yesterday when it crashed mid dungeon in elder scrolls online. Now it won't play any games. Temp readings look fine, mid 40s to 50s with a h100i cooler, i have 850w for a i5 4670k and gtx 780, so that should be ok. Also, I'm not overclocking. In all the responses I've seen people suggest overheating, but I'm pretty sure it's not that. Pretty stumped here. I reckon I"ll pull it apart and check for dust but I can't imagine there being much in so short a time frame. Anybody got any suggestions?
 

D Train

Honorable
Feb 7, 2014
9
0
10,520
Also, I should mention that it works fine for basic browsing and computer use. It just won't play games. Makes me think it might be graphics card or maybe a psu problem but don't know how to test that theory.