Supermicro has established itself as a leader in server technology, and continues its strong commitment to give you the best server solution with the MBD-X8DA3-O server board. This board supports up to two Dual-Core/Quad-Core Intel Xeon 5500 series processors at 4.8 GT/s, 5.86 GT/s, and 6.4 GT/s speeds via the Intel QuickPath Interconnect, to handle even the most demanding applications. With 12 DIMM slots, it can support up to 96GB ECC registered or 24GB unbuffered DDR3 800/1066/1333MHz memory to significantly improve the computing capability. This motherboard has a full range of expansion choices: it features two PCI Express 2.0 x16 slots, providing substantial I/O bandwidth for current and future application needs. It protects your investment with one PCI Express x4 slot and three PCI slots as flexible options for server utilization. The server motherboard has integrated 6 SATAII 300MB/s ports which have built-in RAID support for better data protection. This really benefits small- to medium-sized bu CPU Type: Supports up to two Intel 64-bit Xeon processor(s) of the same type below: Intel Xeon Processor 5600 Series (Westmere) Intel Xeon Processor 5500 Series (Nehalem-EP) QPI: Up to 6.4 GT/s South Bridge: Intel ICH10R Other Chipset: IOH-36D Number of DDR3 Slots: 12 x 240pin Maximum Memory Supported: Supports up to 192 GB 1333 / 1066 / 800MHz DDR3 ECC Registered memory Supports up to 48 GB 1333 / 1066 / 800MHz DDR3 ECC / Non ECC Unbuffered memory ECC Supported: Yes Registered: Yes