ASUS EAX1900XTX (RADEON X1900 XTX) 512MB PCI-E ASUS EAX1900XT CrossFire (RADEON X1900 XT CrossFire Edition) 512MB PCI-E and CrossFire Based on ATI Xpress 3200 (RD580)
ATI Genuine Mac Pro Graphics Card Radeon X1900XT PCIe 512MB Dual DVI : Amazon.co.uk: Computers & Accessories
102-B04202-11-AT - ATI Radeon X1900XT 512MB GDDR3 256-Bit PCI Express x16 Dual DVI/ HDTV/ S-Video/ Composite Out Video Graphics Card