Single socket H4 (LGA 1151) supports Intel Xeon processor E3-1200 v6/v5 Up to 64GB Unbuffered ECC UDIMM DDR4 2400MHz; 4 DIMM slots Expansion slots: 1 PCIe 3.0 x8 (in x16), 1 PCIe 3.0 x8, 1 PCIe 3.0 x4 (in x8) M.2 NGFF connector M.2 Interface: PCIe 3.0 x4 and SATA Form Factor: 2242, 2260, 2280, 22110 6 SATA3 (6Gbps) via C236; RAID 0, 1, 5, 10