EVGA 1GB GeForce 8400 GS DirectX 10 64-Bit DDR3 PCI Express 2.0 x16 HDCP Ready Video Card Model 01G-P3-1302-LR EVGA 8400 GS has awesome features at an incredible value - Essential for watching HD DVD and Blu-ray movies on a PC. EVGA's 24/7 Technical Support Base Clock: 520 MHz Memory Clock: 1200 MHz Effective CUDA Cores:8,Requirements:350 Watt or greater power supply with a minimum of 18 Amp on the +12 volt rail,PCI Express, PCI Express 2.0 or PCI Express 3.0 compliant motherboard with one graphics slot,Windows 7,Vista.xp(32/64bit) Memory Detail: 1024MB DDR3 Memory Bit Width 64 Bit / Memory Bandwidth: 9.6 GB/s Recommended PSU: 300W or greater power supply