GPU or Driver Problem? (MSI R7950)

Good evening, 


I was playing League when suddenly black lines appeared on my screen. These lines go in all directions.


I have been using my MSI R7950 for a month now without issue, until last night.


I re-installed the Beta drivers (13.11 beta), then tried the normal drivers (13.9), and the issue remains.


I don't know if this is relevant, but when I uninstall my drivers off the computer and restart my computer, the lines disappear. They re-appear only when the drivers are installed again.


Any suggestions to what the problem might be, and what I could do to fix it?