i would give what 555BUK suggests unplug everything you dont need to post
right now you dont know if its your graphics card or your power supply
just cause it runs fine with a 7300gs dont mean the power supply is working fine it just means it not being pushed as hard with the 7300gs
right now you dont know if its your graphics card or your power supply
just cause it runs fine with a 7300gs dont mean the power supply is working fine it just means it not being pushed as hard with the 7300gs