AsRock Rack SPC621D8 ATX Server Motherboard Single Socket P+ (LGA 4189) 3rd Gen Intel® Xeon® Scalable Processors C621A. ATX (12" x 9.6") Supports 3rd Gen Intel® Xeon® Scalable Processors 8 DIMM slots (1DPC), supports DDR4 RDIMM, LRDIMM, RDIMM/LRDIMM-3DS, and Intel® Optane™ Persistent Memory 4 PCIe4.0 x16, 3 PCIe4.0 x8 Supports 1 M.2 (PCIe3.0 x4), 1 M.2 (PCIe3.0 x1 or SATA 6Gb/s) 13 SATA 6Gb/s (including 1 port from M.2) 2 RJ45 (1GbE) by Intel® i210 Remote management (IPMI)