Okay so I'm getting this:
Amazon.com: BFG Tech NVIDIA GeForce 9500 GT 1 GB DDR2: Electronics
According to the NVIDIA site it uses 50 watts, and I heard that the 8500 GT uses about 30 watts (cannot confirm). Considering the other components my comp has, I hope that won't cause any issues?
There is nothing else upgraded on this computer hardware wise unless you count the 500 Gig HP portable media drive.