ummm... yea. First off, dont get a pci card. Just dont. And, secondly, a video card alone will not make that thing run games. If his mobo is that...slow, then i cant imagine what his cpu speed is. Get on his computer and open internet explorer(not firefox) and go to google, type in windows game advisor. open the first result. Click start, then click the my game advisor tab at the top. Hit the scan or start or whatever button starts it. Let it install everything, and it will tell you about his cpu, ram, suond card, ect... and post what you get.
Intel Conroe e6750
SLI EVGA 8800gts KO's
4GB Patriot DDR2 800mhz
22" Widescreen Sceptre LCD monitor 5ms
OCZ 700W psu
320gb seagate w/ perpindicular tech.
Creative SB X-Fi Fatality
Thermaltake Armor: Extreme Edition