Using the first generation of Intel's Extended Server Memory Architecture, Pentium Pro CPUs address 64GB of memory rather than 4GB. The Pentium Pro was succeeded by the Pentium II. See Pentium.
Released in March 1994, Socket 5 was designed for second-gen P5 Pentium processors among other Intel parts, but could also accept AMD K5 chips, as well as 6x86 Cyrix CPUs and IDT's WinChip series.