Retail Geforce 8400GS Pcie 512MB 2PORT Dvi HDtv Tv Out BFG Tech GeForce 8400GS 512MB DDR2 PCI Express Video Card General Features: NVIDIA GeForce 8400 GS graphics processing unit (GPU) Core clock: 450 MHz Shader clock: 1134MHz 512 MB DDR2 memory 128-bit memory interface 600 MHz memory data rate PCI Express x16 interface NVIDIA Unified Architecture NVIDIA GigaThread technology NVIDIA Lumenex Engine NVIDIA Quantum Effects