The Socket 423, utilizing the pin grid array, was used by Intel for the Pentium 4 processor, but only for a short period. It was used from November 2000 to August 2001, less than one year, for Pentium 4 1.3 GHz to 2.0 GHz processors. It was determined to be inadequate at being used for processors over 2.0 GHz in speed and was discontinued.
Socket 423 Pentium 4 processors had a voltage range of 1.0 to 1.85 and a physical size of 2.1 inches by 2.1 inches. When discontinued in August 2001, it was replaced by Socket 478 processors. Due to the short life of Socket 423, an adapter was built, called the PowerLeap PL-P4/N, that allowed for Socket 478 processors to be used in a Socket 423 motherboard.