Re: I was playing l4d2 and suddenly this happened...
Problem was fixed in my end as well. All I did was get rid of all the dust that accumulated in my graphics card. If it happens again it may be the drivers I am using, but so far all is good.
__________________Windows 7 Pro 64 OS * i7 2600K @4.5Ghz * ASUS P8P67 PRO (B3) * 4GB G.Skill Ripjaws X *
EVGA GTX 670 FTW Edition * Cooler Master HAF 932