My computer started crashing in several games, even games that previously worked.

[Kraminius]

So yea. I build my PC, and it all worked great...
Suddenly, out of no where, my computer started crashing on several games.

Specs:
CPU: i7-4770K stock clock, AIO-liquid cooler (temp max at 48*C)
GFX: Asus R9-280X DirectCu stock clock - running at the specified 80*C.
RAM: 16gb Kingston Blu 1600 mhz ram.
MOBO: ASRock Z87M Pro4
Primary drive: Kingston SSDnow V300 120gb
Secondary drive: Some 2tb samsung 7200 rpm drive.

Running DirectX 11
AMD CCC: 2013.1107.1129.20543

Games affected:
Star Wars: The Old Republic
Trials Gold (or more specifically, the uplay application who pops up before Trials).
I tried moving Star Wars over from my SSD to my Secondary HDD, and it still crashes. I tried reinstalling both Trials and Star Wars, and it doesn't fix the situation either.
IOS: Windows 7 Ultimate

Is there any way to test what is going on? The event-log seems non-exisisting after a crash (where I need to reboot my PC), so I can't find anything from there..

Kind regards.

 

[Kraminius]

Must of been a driver problem. Installed Windows 8.1 and the problem doesn't show up anymore.