XFX PVT84JUDD3 GeForce 8600GT XXX 256MB GDDR3 PCI Express x16 SLI Ready Video Card (Dual DVI/S-Video) PCI-Express SLI-ready video card with 256 MB of 128 bit DDR3 memory Full support for Microsoft DirectX 10.0 Shader Model 4.0 PCI-Express and Open GL 2.0 support NVIDIA SLI Technology allows two graphics cards to run simultaneously Dual Link DVI for high resolution monitors (up to 2560x1600)