EVGA nVidia GeForce 9800GT SuperClocked Edition 512 MB DDR3 2DVI PCI-Express Video Card 512-P3-N977-TR PCI Express 2.0 9800GT SC with 650MHz clock 512MB of GDDR3 memory 950MHz clock with 1900MHz effective memory rate and 1625MHz shader clock Full DirectX 10 and Open GL 2.1 Support