ASUS F1A55-M/CSM FM1 AMD A55 (Hudson D2) HDMI USB 3.0 Micro ATX AMD Motherboard AMD A-& E2- series Accelerated Processor with AMD Radeon HD 6000 Series Graphics, Up to 4 CPU cores, FM1 Package DirectX 11 Support 4 x DIMM, max. 32GB, DDR3 2250(O.C.)/1866/1600/1333/1066 MHz memory 2 x USB 3.0 ports (2 ports at back panel) 2 x PCI Express 2.0 x16 slots with ATI CrossFireX support 1 x HDMI, 1 x DVI, 1 x D-Sub, 1 x COM connector, 1 x TPM Header UEFI BIOS - BIOS control via a Graphical Interface with a mouse controlled support featuring unparalleled control options, 2.2TB or higher native HD support, and Quick Boot features EPU - System Level Energy Saving & Real-time Power Management for Superb Platform Power Efficiency