{{Short description|Intel CPU socket}} {{Infobox CPU socket |name = Socket 1 |formfactors = PGA |contacts = 169 |type = ZIF |protocol = ? |fsb = 16–33 MT/s |voltage = 5 V |processors = Intel 486 SX, 486 DX, 486 DX2, 486 OverDrive |predecessor = |successor = Socket 2 |image=Socket 1 ZIF.png }}
'''Socket 1''', originally called the "OverDrive" socket, was the second of a series of standard CPU sockets created by Intel into which various x86 microprocessors were inserted. It was an upgrade to Intel's first standard 169-pin pin grid array (PGA) socket and the first with an official designation. Socket 1 was intended as a 486 upgrade socket, and added one extra pin to prevent upgrade chips from being inserted incorrectly.
Socket 1 was a 169-pin zero insertion force (ZIF) 17×17 pin grid array (PGA) socket suitable for the 5-volt, 16 to 33 MHz 486 SX, 486 DX, 486 DX2 and 486 OverDrive processors.<ref>{{cite web|title=Intel Socket 1 Specification |website=The PC Guide |first=Charles M. |last=Kozierok |url=http://www.pcguide.com/ref/cpu/char/socketSocket1-c.html |date=April 17, 2001 |accessdate=2008-03-30 |url-status=dead |archive-date=2008-03-20 |archive-url=https://web.archive.org/web/20080320071309/http://www.pcguide.com/ref/cpu/char/socketSocket1-c.html }}</ref> At least two sources claim that it was also used for the i487SX upgrade socket.<ref name=informit>{{cite web | last= | first= | date=June 8, 2001 | url=https://www.informit.com/articles/article.aspx?p=130978&seqNum=28 | title=Microprocessor Types and Specifications | work=InformIT | publisher=Pearson | archiveurl=https://web.archive.org/web/20211207005251/https://www.informit.com/articles/article.aspx?p=130978&seqNum=28 | archivedate=December 7, 2021}}</ref><ref>{{cite web |title=Intel 487SX Math Coprocessor |url=https://micro.magnet.fsu.edu/optics/olympusmicd/galleries/chips/intel487sxa.html |website=Molecular Expressions: Science, Optics & You |publisher=Florida State University |access-date=January 11, 2026}}</ref>
==See also== * List of Intel microprocessors
==References== {{Reflist}}
==External links== * [http://pclinks.xtreemhost.com/sockets.htm CPU Sockets Chart]
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Socket 001