I guess you want SLi this would be one of the few choices.
http://www.newegg.com/app/View...tion=14-130-222&depa=0
http://www.newegg.com/app/View...tion=14-130-222&depa=0
LEARN ITIts PCI-E or PCX not PCI-X which is a server standard (64bit 66mhz/100mhz/133mhz)
