Socket 423

Socket 423 is the first CPU socket designed for the Intel Pentium 4 processor. Since this base only allowed clock frequencies up to 2 GHz due to its electrical design, it was relatively quickly replaced by Socket 478.

To the base 423, the quad data rate method was used for the first processor from Intel, wherein each clock cycle, four data words have been transmitted. This led to the term " FSB 400 " at 100 MHz bus clock and the marketing name Quad Pumped.