I got a new MSI HD6850 and it is acting a weird. The graphics card has not been overclocked and the temperature is normally at 50 °C. I also have have XFX 6850 and that one works fine.
I have managed to record the problem AMD HD6850 Problem - YouTube
My PC spec...
Motherboard: ASUS M5A78L/USB3
CPU: AMD Phenom II X6 1090T
Graphics Card: MSI AMD HD6850 1GB
PSU: Seasonic 330W
Memory: Kingston 12GB DDR3
HDD: Segate 320GB
This is the error
A problem with your video hardware caused Windows to stop working correctly.
Problem Event Name: LiveKernelEvent
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 2057
Extra information about the problem
OS Version: 6_1_7601
Service Pack: 1_0
Bucket ID: X64_0x117_Tdr:3_TdrVTR:14_IMAGE_atikmpag.sys
Server information: 5de87260-70ef-4b8b-b2f9-1b89211f88d7