Malo je nategnuta teorija jer kod tebe se ne javljaju sive crte ali ima i slučajeva rušenja baš kao kod tebe:
Citiraj:
As promised, ATI and AMD have issued a fix for a previously reported problem that causes grey or colored lines appearing on screens and in some cases crashing.
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Ništa te ne košta instalirati hotfix pa da bar otklonimo i tu mogućnost uzroka problema.
http://www.tomshardware.com/news/ATI...-Fix,9604.html