What is Socket 7? - Definition from WhatIs.com
Part of the Microprocessors glossary:

Socket 7 is the descriptive term for the way certain Intel Pentium microprocessors plug into a computer motherboard so that it makes contact with the motherboard's built-in wires or data bus. Socket 7 is the best-known of eight connection variations that use the Zero Insertion Force (ZIF) socket. As its name implies, the ZIF socket is designed for ease of manufacture and so that the average computer owner will be able to upgrade the microprocessor. The ZIF socket contains a lever that opens and closes, securing the microprocessor in place. Various sockets have a differing number of pins and pin layout arrangements.

For its Pentium II processor, Intel has moved from the socket configuration to an approach in which the processor is packaged in a cartridge and fits into a slot in the motherboard.

The following table summarizes the socket characteristics for different Intel processors.

SocketPinsLayoutProcessor(s)Voltage
0168Inline486DX5 V
1169Inline486DX,SX5 V
2238Inline486DX,SX,DX25 V
3237Inline486DX,SX,DX2,DX43V or 5 V
4273Inline60 or 66 MHz Pentium5 V
5320StaggeredPentium3 V
6235Inline486DX43 V
7321StaggeredPentium3 V
8387StaggeredPentium Pro3 V

This was last updated in April 2005
Contributor(s): Nicky Pasternak
Posted by: Margaret Rouse

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