GF 9800GX2 680M 1024 MB DDR3 DUAL DVI XXX Shader Clock: 1700 MHz Clock rate: 680 MHz Dual Link DVI - Supporting digital output up to 2560x1600: Yes (Dual) Memory Clock: 2.08 GHz Chipset: GeForce 9800 GX2 Memory: 1.0 GB Bus Type: PCI-E 2.0 Memory Type: DDR3 Memory Bus: 512-bit Output: Dual DVI, HDMI Highlighted Features: RoHS , SLI ready , HDCP Ready , Vista