EVGA e-GeForce 8800 GTS KO Edition 512 MB DDR3 PCI-Express 2.0 Graphics Card (512-P3-N845-AR) PCI Express 2.0 Compatible 256-bit GeForce 8800 GTS with 700MHz clock 512MB 256-bit 1 ns GDDR3 memory 990 MHz clock/1.98 GHz effective memory rate Full DirectX 10 and Open GL 2.0 Support