I recently got a new radeon 9600 pro 256mb video card, my specs are shown in my signature below. When i start up my computer with it it all works fine nothing is different. Then when i start up a game everything is fine in the menus, but when i start up a game within a minute of playtime my computer just shutsdown very fast and my screen turns black and i cant do anything at all, i was told it may be my power supply and i was just wondering how many watts/volts of a power supply is good enough for this video card? thanks