Supermicro Mini-ITX SoC Xeon D-1521 4-Core, FCBGA 1667 Motherboard - X10SDV-4C-TLN2F-O Intel Xeon processor D-1520/1521, Single socket FCBGA 1667; 4-Core, 8 Threads, 45W Up to 128GB ECC RDIMM DDR4 2133MHz or 64GB ECC/non-ECC UDIMM in 4 sockets 6x SATA3 (6Gbps) ports via SoC Expansion slot: 1x PCIe 3.0 x16 M.2 PCIe 3.0 x4, M Key 2242/2280 2x USB 3.0 ports (rear); 4x USB 2.0 ports (via headers)