Hi this is my first post. lately my pc has been restarting itself while playing games. i recently installed a new video card. i think it could be low power supply. anyone have any ideas?
I bet it's a PSU problem. The 9600gt requires a 400watt PSU, but it requires 26amps of power across all of your (if you have more than 1) 12v rails. If you don't have that much amperage, your video card underload could cause your computer to not have enough power, resulting in it shutting down.
There's some nice PSUs that you can get that aren't too expensive. Try to get a 550watt or higher, because I'm sure you'll want some room for expansion in the future.