Specifications Outputs 1x D-Sub (VGA) 1 x HDMI 1 x Dual-Link DVI-D GPU 650 MHz Core Clock 40 nm Chip Video Memory 1024 MB Size 64-bit DDR3 1333 MHz Effective Dimension 168 (W) x 72.87 (H) x 25 (D) mm Size 1 x slot System Requirements PCI Express based PC is required with one X16 lane graphics slot available on the motherboard. Certified power supplies are recommended. Please refer to: http://support.amd.com/us/certified/power-supplies/ Pages/listing.aspx 1024MB Minimum of system memory. Installation software requires CD-ROM drive. DVD playback requires DVD drive. Blu-ray / HD DVD playback requires Blu-ray / HD DVD drive. For an AMD Cross Fire X system, a second same AMD Radeon graphics card, an AMD Cross Fire X Ready motherboard & one AMD Cross Fire X Bridge Interconnect cable per graphics card (optional) are required. 400 Watt Power Supply is required. For best cooling performance, a chassis installed with at least one 120mm or 90mm fan is required.