Is this a GFX problem?

SphereUK

Distinguished
Oct 17, 2013
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18,510
Just got a new PC built for a friend, on start-up it was fine, installed windows 7, all AMD drivers etc all went fine.

But when I installed League of Legends & World of Warcraft and went he went to play after about 10 seconds in game, this happened :(

This doesnt go away until a PC restart is done :(

Any ideas what this could be ? Build info below.

BUILD INFO