LGA 1366 is the socket for the 1st generation Intel® Core™ i7-9XX processors and supports the QPI memory interface (triple channel memory). The LGA 1366 is only used in higher performance desktop boards or server boards that also use triple channel memory. The LGA 1156 is the socket that supports the 1st generation Intel Core processors that use a DMI (dual memory interface). This is a main stream desktop board socket and is also used in entry level server boards and processors.
Intel Enthusiast Team