EVGA nVidia GeForce GTS 250 512 MB DDR3 2DVI/HDTV PCI-Express Video Card 512-P3-1153-TR PCI Express 2.0 GeForce GTS 250 with 738 MHz core clock 512 MB of DDR3 memory 2200 MHz memory clock and 1782 MHz shader clock Full DirectX 10 Shader model 4.0 and Open GL 3.0 Support