4189 S Supermicro MBD-X12SPM-TF-O

3rd Gen Intel Xeon Scalable processors, Single Socket LGA-4189 (Socket P+) supported, CPU TDP supports Up to 270W TDP Intel C621A Up to 2TB 3DS ECC RDIMM, DDR4-3200MHz; Up to 2TB 3DS ECC LRDIMM, DDR4-3200MHz Up to 2TB Intel Optane Persistent Memory 200 Series, in 8 DIMM slots 1 PCI-E 4.0 x8, 2 PCI-E 4.0 x16, 4 PCI-E 4.0 NVMe x4 Internal Port(s) M.2 Interface: 1 SATA/PCI-E 3.0 x4 M.2 Form Factor: 2280, 22110 M.2 Key: M-Key 4x NVMe port PCI-E 4.0 x4 via SlimSAS connector