EVGA nVidia GeForce GTS 250 1 GB DDR3 2DVI/HDTV PCI-Express Video Card 01G-P3-1158-TR PCI Express 2.0 GeForce GTS 250 with 738 MHz core clock 1024 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