X8DXD DELL MOTHERBOARD FOR DELL PRECISION 5820 TOWER WORKSTATION ( T5820 ) - SYSTEM BOARD ( 1 ) ONE FCLGA2066 CPU SOCKET R4 ( SUPPORTS INTEL XEON W SERIES - SKYLAKE / W-2100 / W-21XX ) ( 8 ) EIGHT DIMM SLOTS
LGA 2066 - Wikipedia
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
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00FC984 LENOVO MOTHERBOARD FOR LENOVO THINKSTATION P520C HIGH PERFORMANCE WORKSTATION - SYSTEM BOARD ( 1 ) ONE FCLGA2066 R4 CPU SOCKET ( 4 ) FOUR DIMM SLOTS ( 2 ) TWO M.2 INTERFACES