Supermicro X11SRM-VF Motherboard mATX for single Intel Xeon Processor W family, Socket R4 LGA 2066, up to 128GB ECC RDIMM or 256GB ECC LRDIMM | Wiredzone
Amazon.com: ASUS WS C422 PRO/SE LGA2066 ECC DDR4 M.2 U.2 ATX Motherboard for Intel Xeon W-Series Processors with SafeSlot : Electronics