Attempt to reset the display driver and recover from timeout failed W7

So when im trying to play games it freezes after like 30 - 60 mins and i get a black screen after that i get a bleu screen saying : '' Attempt to reset the display driver and recover from timeout failed ''. i installed a fresh copy of windows 7 like twice allready got the new drivers and stuff. Can somebody help me please?. I own this computer for like a year now and never had this problem ever...

Specs :
CPU : i5 2500k
RAM : 8GB
MOBO : Asus P8Z77-V LX (LGA1155) Rev 3.1 B3 Devision
GPU : AMD Radeon HD 6950
Monitor : ASUS VH 238 ( 1920x1080 60Hz )
Windows 7 Ultimate 64 bit.

Don't...

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http://www.tomshardware.com/forum/283384-33-read-first