Wow, that's .. kinda opposite world from a few years ago. For the Intel chips, the socket remained consistent from the Pentium D all the way up to the Core2Duo. IIRC they had an offboard memory management unit, so the chips wasn't tied directly to a motherboard. The AMDs on the other hand had integrated MMUs and each new chip required a totally different board and the processors themselves were tied to the RAM type (DDR2 vs DDR3 etc).
Intel switched to the AMD model starting with the i3/i5/i7 series, now moving to an integrated MMU themselves.
