PC hangs up constantly; have to restart; going crazy; please help.

johnsonrcj

Distinguished
Apr 4, 2010
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18,510
Why does my PC hang up causing me to restart constantly. Problems identified are with the video card. Here is my system info:
CPU is Q9550 2.83GHZ
RAM: 4 GB DDR3
OS: Vista Ultimate, 64 bit
Mouse: Logitech optical trackman
MB: DDR3
Video: GTS 250 512mb DDR3
RAID 0
Power Supply: 800 watts
Monitors: Two of HP w2207h 22" VGA