EVGA 896-P3-1170-AR GTX 275 896 MB DDR3 PCI-Express 2.0 Graphics Card PCI Express 2.0 GeForce GTX 275 with 633 MHz clock 896MB of DDR3 memory 2268 MHz memory clock and 1404 MHz shader clock Full DirectX 10 Shader model 4.0 and Open GL 3.0 Support