Its Windows Vista 64 bit and a 8800 gt, going to try what Karthik said real quick and Ill get back to yah. But shouldn't clicking search for new hard ware detect the graphics card?
Ok, i just reinstalled my 9400 gt with absolutely NO problem, mower power supply maxes out at 500watts, shouldnt that be enough for an 8800gt? Also when I put the 8800gt the fan runs 100% but the computer still wont detect it.
Hmm, then try your card(8800GT) in different PC, see if the same problem exist then you have a bad card...