Socket 1
Intel CPU socket
title: "Socket 1" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["intel-cpu-sockets"] description: "Intel CPU socket" topic_path: "general/intel-cpu-sockets" source: "https://en.wikipedia.org/wiki/Socket_1" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Intel CPU socket ::
::data[format=table title="Infobox CPU socket"]
| Field | Value |
|---|---|
| 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 |
| successor | Socket 2 |
| image | Socket 1 ZIF.png |
| :: |
|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. At least two sources claim that it was also used for the i487SX upgrade socket.
References
References
- Kozierok, Charles M.. (April 17, 2001). "Intel Socket 1 Specification".
- (June 8, 2001). "Microprocessor Types and Specifications". Pearson.
- "Intel 487SX Math Coprocessor". Florida State University.
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