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Socket 5 was released in March 1994 and was developed, among other things, for P5 Pentium processors of the second generation. However, it can also accommodate AMD K5 chips as well as 6×86 Cyrix CPUs and the WinChip series from IDT.
The summer of 1995 brought a successor to Socket 5 with the arrival of Socket 7 (Socket 6 was essentially skipped), which also supported P5 Pentium processors as well as compatible parts from AMD, Cyrix / IBM and IDT. Socket 7 parts were backward compatible with Socket 5 with an adapter (unless you wanted to modify the pins yourself). The main difference between the two was that Socket 7 had an extra pin for dual split rail voltage versus Socket 5's single voltage.
Super Socket 7 didn't arrive until 1998 and served AMD as a stopgap solution. After losing the license for Intel's sockets, which had been developed for slot 1 in 1997, the company bought time to develop its own motherboard infrastructure (slot A).