eVGA e-GeForce 8800 GS 384MB DDR3 PCI-E 2.0 Graphics Card (384-P3-N851-AR) PCI Express 2.0 Support 256-bit GeForce 8800 GS with 550MHz clock 384MB 192-bit GDDR3 memory 800 MHz clock/1600 MHz effective memory rate Full DirectX 10 and OpenGL 2.1 support