LGA 1155, also called Socket H2, is a zero insertion force flip-chip land grid array (LGA) CPU socket designed by Intel for their CPUs based on the Sandy Bridge and Ivy Bridge microarchitectures.
LGA 1155
View of the socket LGA 1155 on an Intel Core i7 Sandy Bridge 2600K model CPU
Celeron G530 "Sandy Bridge" installed on a Socket 1155
The land grid array (LGA) is a type of surface-mount packaging for integrated circuits (ICs) that is notable for having the pins on the socket — as opposed to pins on the integrated circuit, known as a pin grid array (PGA). An LGA can be electrically connected to a printed circuit board (PCB) either by the use of a socket or by soldering directly to the board.
LGA 775 on a motherboard.
The LGA 775 package of a Pentium 4 Prescott CPU.