EVGA GeForce GTX 580 FTW Hydro Copper 2 3072 MB GDDR5 PCI Express 2.0 2DVI/Mini-HDMI SLI Ready Limited Graphics Card, 03G-P3-1591-AR 49.4 GT/s Texture Fill Rate 4008 MHz Effective Memory Clock and 1544 MHz Shader Clock 3072 MB 384-bit GDDR5 Memory PCI Express 2.0 GeForce GTX 580 FTW Hydro Copper 2 with 772 MHz Core Clock GeForce GTX 580 FTW Hydro Copper 2 with 772 MHz Core Clock PCI Express 2.0 3072 MB 384-bit GDDR5 Memory 4008 MHz Effective Memory Clock and 1544 MHz Shader Clock 49.4 GT/s Texture Fill Rate Microsoft DirectX 11 Support