Dell 6PWR4 C6145 LGA1944 Server Motherboard - ServerSupply.com
Why All Servers Are Not 4-Socket Servers - ServeTheHome
FDG2M DELL MOTHERBOARD FOR DELL POWEREDGE R810 - ( 4 ) FOUR CPU LATCH DOWN TYPE SOCKETS 24 DIMM 1.5V SLOTS SUPPORTS E7 PROCESSORS ( WORKS WITH REAR RISER PN: FJM8V )