PowerEdge 750 CPU Socket Type...

What kind of CPU socket is on the PowerEdge 750?

 

I see in the FAQ all of the details on the CPU's, but there is no information about the socket type.

 

http://forums.us.dell.com/supportforums/board/message?board.id=PowerEdgeServer-FAQS&message.id=32

 

I want to use the Celeron CPU that is in my PE750 for another motherboard, but I need to know what kind of socket it is so I can order the right one.