Supermicro MBD-X12SPM-LN4F-O server motherboard

Micro ATX Xeon Server Board

This Supermicro motherboard uses the Intel C621A chipset and an LGA-4189 Socket P+ for single 3rd Gen Intel Xeon Scalable processors up to 270 W TDP. It fits the Micro ATX footprint of 9.6" x 9.6" and provides eight 288-pin DDR4 slots supporting up to 2 TB of 3200 MHz ECC RDIMM, LRDIMM or Optane Persistent Memory 200 Series. The board is aimed at builders assembling dense 1U or tower servers that need high core counts in a compact chassis.

Not for Dual-Socket or ATX Builds

The single-socket design cannot accommodate dual-processor configurations, so clusters requiring two CPUs per node should choose a different platform. The Micro ATX layout also limits expansion to three PCIe 4.0 slots and omits the extra DIMM channels found on full-size ATX or E-ATX server boards. Buyers needing more than one M.2 slot, 10 GbE onboard, or a larger slot count must look elsewhere.

Eight DDR4 Slots Decide Capacity

Eight 288-pin DDR4-3200 slots set the absolute memory ceiling at 2 TB using 3DS ECC RDIMM, LRDIMM or Intel Optane Persistent Memory 200 Series modules. Population rules for maximum capacity depend on the specific processor SKU and DIMM rank configuration, so verify the CPU memory-controller limits before purchasing memory kits.