The EVGA 8400 GS delivers the features of the Ge Force 8 series architecture at an incredible value. With the worlds first video processor able to offload 100% of Blu-ray & HD DVD H.264 video decoding from the CPU, this ensures you get better performance & outstanding image quality. A revolutionary architecture enhances 3D gaming features, with full support for Direct X 9 & next generation Direct X 10 games, enabling unparalleled levels of graphics realism & film-quality effects. Performance: NVIDIA 8400 GS 8 Processing Cores 520 MHz GPU 1238 MHz Shader Clock Memory: 512 MB, 32 bit DDR3 1200 MHz (effective) 4.8 GB/s Memory Bandwidth Interface: PCI-E 2.0 x 16 DVI-I, HDMI, VGA Resolution & Refresh: 240 Hz Max Refresh Rate Max Analog: 2048x 1536 Max Digital: 2560x 1600 (Dual Link DVI Only) Operating System Support: Windows 7 32/64bit Windows Vista 32/64bit Windows XP 32/64bit Requirements: Minimum of a 350 Watt power supply. (Minimum recommended power supply with +12 Volt current rating of 18 Amps.)