Specifications

Computer Architecture and Maintenance (G-Scheme-2014)

Processor Slot and Sockets

Q.Write short note on Processor Slot and Sockets.

Ans.

CPU Socket

A CPU socket or CPU slot is a mechanical component(s) that provides

mechanical and electrical connections between a microprocessor and a printed circuit

board (PCB). This allows the CPU to be replaced without soldering.

Common sockets have retention clips that apply a constant force, which must be

overcome when a device is inserted. For chips with a large number of pins, either zero

insertion force (ZIF) sockets or land grid array (LGA) sockets are used instead. These

designs apply a compression force once either a handle (for ZIF type) or a surface plate

(LGA type) is put into place. This provides superior mechanical retention while

avoiding the risk of bending pins when inserting the chip into the socket.

CPU sockets are used in desktop and server computers. As they allow easy

swapping of components, they are also used for prototyping new circuits. Laptops

typically use surface mount CPUs, which need less space than a socketed part.

Function

A CPU socket is made of plastic, a lever or latch, and metal contacts for each of

the pins or lands on the CPU. Many packages are keyed to ensure the proper insertion

of the CPU. CPUs with a PGA (pin grid array) package are inserted into the socket and

the latch is closed. CPUs with an LGA package are inserted into the socket, the latch

plate is flipped into position atop the CPU, and the lever is lowered and locked into

place, pressing the CPU's contacts firmly against the socket's lands and ensuring a good

connection, as well as increased mechanical stability.

http://www.computerhope.com/jargon/s/socket.htm

http://www.tomshardware.com/reviews/processors-cpu-apu-features-upgrade,3569-

15.html

Processor Slot

A slot is a computer processor connection designed to make upgrading the

processor much easier, where the user would only have to slide a processor into a slot.

Prepared By – Prof. Manoj.kavedia (9860174297 – 9324258878 ) (www.kavediasir.yolasite.com)