Supermicro H8DG6-F Server Motherboard - Dual Socket G34 / AMD SR5690 / E-ATX 16 DIMM sockets. Supports up to 512GB Registered ECC or 128GB Unbuffered ECC/non-ECC DDR3 1600/1333/1066 SDRAM in 16 DIMMs. Quad channel memory bus. DDR3 1600/1333/1066 MHz Registered ECC or unbuffered ECC / non-ECC SDRAM 72-bit, 240-pin gold-plated DIMMs.