Visiontek - ATI Radeon Hd3870 Oc 512mb Gddr4 Pci Express Graphics Card Powered by the ATI RADEON HD3870 graphics processing unit (GPU),2340MHz overclocked core speed by manufacture 512MB GDDR4 memory,ATI CrossFireX allows you to upgrade to 3D performance quickly and easily thanks to plug-and-play technology with up to quad-GPU support PCI Express x16-compliant interface; PCI Express 2.0 support Built-in support for 5.1 surround audio,Outputs: HDMI, component vSlot Coolers. Dual DVI inputs with DVI to HDMI & DVI to Analog DSub DB-15 adapter, crossfire bridge included.ideo, S-video and composite video DirectX 10.1 support enhances gameplay by delivering sharper images, more textures and the improved lighting effects that create lifelike interactivity and immersive realism