LGA 1366, also known as Socket B, is an Intel CPU socket

CPU socket

A CPU socket or CPU slot is a mechanical component that provides mechanical and electrical connections between a microprocessor and a printed circuit board . This allows the CPU to be replaced without soldering....

. This socket supersedes Intel's LGA 775 (Socket T) in the high-end and performance desktop segments. It also replaces the server-oriented LGA 771

LGA 771

LGA 771, also known as Socket J, is a CPU interface introduced by Intel in 2006. It is used in Intel Core microarchitecture based DP-capable server processors, the Dual-Core Xeon is codenamed Dempsey, Woodcrest, and Wolfdale and the Quad-Core processors Clovertown, Harpertown...

 (Socket J) in the entry level and is superseded itself by LGA 2011

LGA 2011

LGA 2011, also called Socket R, is a CPU socket by Intel. It replaces Intel's LGA 1366 and LGA 1567 in the performance and high-end desktop and server platforms. The socket has 2,011 protruding pins which touch contact points on the underside of the processor.Socket R uses QPI to connect the CPU...

. LGA stands for land grid array

Land grid array

The land grid array is a type of surface-mount packaging for integrated circuits that is notable for having the pins on the socket rather than the integrated circuit...

. This socket has 1,366 protruding pins which touch contact points on the underside of the processor (CPU) and accesses up to three channels of DDR3 memory via the processor's internal memory controller.

Socket 1366 (Socket B) uses QPI to connect the CPU to a reduced-function northbridge

Chipset

A chipset, PC chipset, or chip set refers to a group of integrated circuits, or chips, that are designed to work together. They are usually marketed as a single product.- Computers :...

 that serves mainly as a PCI-Express controller.