GIGABYTE R281-3C2, Intel® C621, LGA 3647 (Socket P), Intel, Intel® Xeon®, Intel® Xeon®, DDR4-SDRAM GIGABYTE R281-3C2. Motherboard chipset: Intel® C621, Processor socket: LGA 3647 (Socket P), Processor manufacturer: Intel. Supported memory types: DDR4-SDRAM, Supported DIMM module capacities: 64GB, Supported RDIMM clock speeds: 2133,2400,2666 MHz. Storage drive sizes supported: 2.5,3.5", Supported storage drive types: HDD & SSD, Supported storage drive interfaces: Serial Attached SCSI (SAS), Serial ATA III. On-board graphics card model: Aspeed AST2500. Ethernet interface type: Fast Ethernet, Gigabit Ethernet, Ethernet LAN data rates: 10,100,1000 Mbit/s, LAN controller: Intel® I350-AM2