ZOTAC ZT-60101-10P GeForce GTX 680 2GB GDDR5 PCI Express 3.0 HDMI Dual DVI DisplayPort SLI Ready Graphics Card 1536 processor cores, 256-bit memory bus, Engine clock (base): 1006 MHz (boost): 1058 MHz, Memory clock: 608 MHz, PCI Express 3.0 (compatible with 1.1) NVIDIA GeForce driver, Microsoft DirectX 11, OpenGL 4.2, Microsoft Windows XP/Vista/7 DVI-I (VGA wih included adapter), DVI-D (digital only), Quad simultaneous display capable, HDCP compliant, Dual SLI bridge connectors (3-way)