Socket 5
Socket 5 was created for the second generation of Intel P5 Pentium processors operating at speeds from 75 to 133 MHz as well as some Pentium OverDrive and early Pentium MMX processors with core voltage 3.3 V. Released in March 1994, it superseded the earlier Socket 4. Consisting of 320 pins, this was the first socket to use a staggered pin grid array, which allowed the chip's pins to be spaced closer together than earlier sockets. Socket 5 was replaced by Socket 7 in 1995.