EVGA GeForce GTX 570 HD 1280 MB GDDR5 PCI Express 2.0 2DVI/HDMI/Display Port SLI Ready Limited Graphics Card, 012-P3-1571-AR 43.9 GT/s Texture Fill Rate 3800 MHz Effective Memory Clock and 1464 MHz Shader Clock 1280 MB 320-bit 0.5ns GDDR5 Memory PCI Express 2.0 GeForce GTX 570 HD with 732 MHz Core Clock GeForce GTX 570 HD with 732 MHz Core Clock PCI Express 2.0 1280 MB 320-bit 0.5ns GDDR5 Memory 3800 MHz Effective Memory Clock and 1464 MHz Shader Clock 43.9 GT/s Texture Fill Rate Microsoft DirectX 11 Support