Socket 3
Chip form factorsPPGA
FSB protocol?
FSB frequency25–50 MT/s
Voltage range3.3 V and 5 V
ProcessorsIntel 486 SX, 486 DX, 486 DX2, 486 DX4, 486 OverDrive, Pentium OverDrive
AMD Am486 and Am5x86
PredecessorSocket 2
SuccessorSocket 4
Socket 6

This article is part of the CPU socket series

Socket 3 was a series of CPU sockets for various x86 microprocessors. It was sometimes found alongside a secondary socket designed for a math coprocessor chip, such as the 487[citation needed]. Socket 3 resulted from Intel's creation of lower voltage microprocessors. An upgrade to Socket 2, it rearranged the pin layout. Socket 3 is compatible with 168-pin socket CPUs.[1]

Socket 3 was a 237-pin low insertion force (LIF) or zero insertion force (ZIF) 19×19 pin grid array (PGA) socket suitable for the 3.3 V and 5 V, 25–50 MHz Intel 486 SX, 486 DX, 486 DX2, 486 DX4, 486 OverDrive and Pentium OverDrive processors as well as AMD Am486, Am5x86 and Cyrix Cx5x86 processors.[2]

See also


  1. ^ "Intel CPUs". 17 June 2021.
  2. ^ Intel Socket 3 Specification,, retrieved 2009-03-30