ATI Radeon 2600PRO Bus Type: PCI-Express Core Clock: 600Mhz Memory Size: 256MB GDDR2 Memory Configuration: 16x16 Memory Speed: 800Mhz Memory Interface: 128 Bit HDCP CrossFire Support - Software Display Formats: Dual DVI Dual Link HDCP + HDTV-out Form Factor: ATX. VISTA CERTIFIED.