Supermicro X11SRA-RF server motherboard

Single-socket LGA 2066 workstation board

The Supermicro X11SRA-RF is a server motherboard built for a single Intel Xeon W-series processor in the LGA 2066 socket. It supports CPUs up to 140 W TDP and the Intel C422 chipset. The board targets workstation and entry-server builds that need high core counts and large memory capacity in a single-socket layout.

Suited for ECC memory and multi-GPU compute

This board suits users who need registered ECC DDR4 memory up to 256 GB in RDIMM or 512 GB in LRDIMM across eight slots at 2666 MHz. It also suits builds that require three full-length PCI-E 3.0 x16 slots fed by 48 lanes from Skylake-W CPUs. Buyers who need dual-socket scaling, 10 GbE networking or more than six drive ports should look at a different platform.

48 PCI-E lanes from the CPU

The single specification that decides fit is the 48 PCI-E 3.0 lanes provided by the Skylake-W processor. These lanes wire the three x16 slots and the two M.2 x4 interfaces directly to the CPU. If the chosen Xeon W model offers fewer lanes, the rear x16 slots will negotiate down and the M.2 devices may share bandwidth with other peripherals.