RE: Power Supply Question...
I just updated my video card to a 9800 Pro and no problem with my 350 watt power supply. I'm running a Intel 2.53 ghz, 2 hard drives, a cd read/write drive and a DVD CD drive, plus 3 case fans.
My advice is to make sure you have enough case cooling capacity - the 9800 Pro has a good cooling fan, but something has to move that hot air out of the case.
I7 3770K OC 4.5ghz ASUS Sabertooth Z77, GTX 660 TI 2gb, 8gb RAM, Win 7 Home 64 bit, CH yoke, Pedals and Quadrant