Socket 423

Socket 423 is a 423 pin CPU socket used by the first generation of Pentium 4 processors, based on the Willamette core.

Socket 423
Socket 423.jpg
Chip form factorsOrganic Land Grid Array (OLGA) on Interposer (OOI) (INT2 and INT3)
FSB protocolAGTL+
FSB frequency400 MT/s
Voltage range1.0 - 1.85 V
Processor dimensions2.1 × 2.1 inches[1]
ProcessorsIntel Pentium 4 (1.3GHz to 2.0GHz)
PredecessorSocket 370
SuccessorSocket 478

This article is part of the CPU socket series

It was replaced by Socket 478 in 2001.

Technical specificationsEdit

This socket houses any processor designed in the Socket 423 package.

The socket was short-lived, as it became apparent that its electrical design proved inadequate for raising clock speed beyond 2.0 GHz. Intel produced chips using this socket for less than a year, from November 2000 to August 2001. It was replaced by Socket 478.

The processors used with this socket also have a locked multiplier which means that they are not overclockable unless the front side bus frequency is increased. However raising the FSB frequency could push other buses out of spec and thus cause system instability.

The "PowerLeap PL-P4/N" is a device developed in the form of a socket adapter allowing the use of Socket 478 processors in Socket 423.


  1. ^ "Intel Pentium 4 Datasheet".

External linksEdit