well i beg to differ but you will only need to worry about motherboard compatibility and power if he deicdes to go for pci express upgrade which will need a new mobo,processor,ram(everything).if he is considering a 9200 and decides to go with a 9600 instead the difference between there power consumption would be only negligeble but the performance incresae would be drastic provided of course he has an agp slot at his disposal.other than that there shouldnt be any problem with his current system.