My domestic forums couldn't help me, so i'm asking 'the authority' " src="http://img.tomshardware.com/forum/uk/icones/smile.gif" alt="" />

I have a problem (for some time) with my Gigabyte HD4850 Radeon 512 mb. When i'm playing games like Skyrim, Borderlands, Euro Truck Simulator 2, i witness situation, when application freeze (both sound and display) and (depending on game) quits to desktop or game continues. (during freeze my Screen is restarting).

I tried many drivers , and now i'm using catalyst 11.11

Motherboard - asus p5k ws intel 775
Graphics - gigabyte radeon hd4850 512
CPU - intel core 2 duo e8400

My OS is fresh , windows 7 64 bit. Latest version of bios. My Radeon is not Overclocked, has Arctic Cooling S1 accelero (helped me to lower temperatures from 100 to 60 degrees in stress)