# Socket 423

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Socket_423
> Markdown URL: https://mediated.wiki/source/Socket_423.md
> Source: https://en.wikipedia.org/wiki/Socket_423
> Source revision: 1339251841
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

423 pin CPU socket

Socket 423 Release date 2000 Designed by Intel Type PGA-ZIF Chip form factors Organic Land Grid Array (OLGA) on Interposer (OOI) (INT2 and INT3) Contacts 423 FSB protocol AGTL+ FSB frequency 400 MT/s Voltage range 1.0–1.85 V Processor dimensions 2.1 × 2.1 inches[1] Processors Intel Pentium 4 (1.3–2.0 GHz) Predecessor Socket 370 Successor Socket 478 This article is part of the CPU socket series

**Socket 423** is a 423-pin [CPU socket](/source/CPU_socket) used by [Intel](/source/Intel)'s first generation of [Pentium 4](/source/Pentium_4) [processors](/source/Central_processing_unit) based on the [Willamette](/source/Pentium_4#Willamette) core. It was replaced by the smaller, microPGA-based [Socket 478](/source/Socket_478) in 2001.[2]

## Technical specifications

A Willamette-core Socket 423 Pentium 4, 1.5 GHz

Socket 423 was designed to house any processor in the Socket 423 package. This socket was short-lived, as it became apparent that its electrical design proved inadequate for raising [clock speeds](/source/Clock_speed) beyond 2.0 GHz. Intel only produced chips using this socket in less than a year, from November 2000 to August 2001, when it was replaced by Socket 478.

All processors using this socket have a locked multiplier, meaning that they are not overclockable unless the [front side bus](/source/Front_side_bus) frequency is increased. Doing this, however could push other buses out of spec, causing erratic behaviors such as system instability and premature failure.

The "PowerLeap PL-P4/N" is a device developed in the form of a socket adapter that allows the use of Socket 478 processors in Socket 423 motherboards.[3]

## Heatsink

The 4 holes for fastening the heatsink to the motherboard are placed in a rectangle with lateral lengths of 37 mm and 80 mm.[4]

## Chipsets

### Intel

Further information: [List of Intel chipsets § Pentium 4 chipsets](/source/List_of_Intel_chipsets#Pentium_4_chipsets)

## See also

- [List of Intel microprocessors](/source/List_of_Intel_microprocessors)

## References

1. **[^](#cite_ref-1)** ["Intel Pentium 4 Datasheet"](http://www.intel.com/design/pentium4/datashts/249198.htm).

1. **[^](#cite_ref-2)** ["Computex 2001 Day 1 - Live Coverage"](https://web.archive.org/web/20160104021323/http://anandtech.com/show/778/2). Archived from [the original](https://www.anandtech.com/show/778/2) on January 4, 2016.

1. **[^](#cite_ref-3)** ["Socket 423 to 478 adaptor review"](http://duhvoodooman.com/powrleap/P4N/P4N_1.htm)

1. **[^](#cite_ref-4)** ["Comparison of Socket 423, Socket 478 and Socket A fan mounting hole positions"](http://www.dansdata.com/quickshot012.htm)

v t e CPU sockets and slots by Intel Desktop sockets Slot Slot 1 (1996–1999) PGA 370 (1998–2001) 423 (W 2000–2001) 478 (N 2001–2004) LGA 775 (T 2004–2009) 1366 (B 2008–2010) 1156 (H1 2009–2010) 2011 (R 2011–2013) 1155 (H2 2011–2012) 1150 (H3 2013–2014) 2011-3 (R3 2014–2016) 1151 (H4 2015–2019) 2066 (R4 2017–2019) 1200 (H5 2020–2021) 1700 (V 2021–2023) 1851 (V1 2024) Mobile sockets Mobile Module Connector (1997) Socket 615 Socket 495 Socket 479 (2001) Socket M (2006) Socket P (2007) Socket G1 (2009) Socket G2 (2011) Socket G3 (2013) Server sockets Socket 8 (1995) Xeon processors Slot Slot 2 (1998–2000) PGA 603 (2001–2004) 604 (2002–2007) LGA 771 (J 2006) 1366 (B 2008) 1156 (H1 2009) 1567 (LS 2010) 1155 (H2 2011) 2011 (R 2011) 1356 (B2 2012) 1150 (H3 2013) 2011-1 (R2 2014) 2011-3 (R3 2014) 1151 (H4 2015) 3647 (P 2016) 2066 (R4 2017–2019) 1200 (2020) 4189 (P5 2020) 4677 (E 2023) 4710 (2024) 7529 (2024) Itanium processors 418 (2001) 611 (2002) 1248 (2010) Pre-Pentium II PGA Sockets Socket 1 Socket 2 Socket 3 Socket 6 Socket 4 (1993) Socket 5 (1994–1995) Socket 7 (1995–1997) Super Socket 7 (1996–1999; non-Intel modification of the original Intel Socket 7)

---
Adapted from the Wikipedia article [Socket 423](https://en.wikipedia.org/wiki/Socket_423) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Socket_423?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.