Apple Power Macintosh 7100/80AV - Manual (Page 20)

Specifications Processor - 1
Processor
CPU
Built-in MMU and FPU
32K of on-chip cache memory
7100/66:
66 MHz PowerPC 601 RISC microprocessor
Requires system software version 7.1.2 or later
7100/80:
80 MHz PowerPC 601 RISC microprocessor
Requires system software version 7.5 or later
Note
: To run System 7.5 on the Power Mac 7100/80, you must
install enabler version 1.1.1 or later. This version of the
system software, which ships with the unit, requires Finder
version 7.1.5. You can verify that you have the correct Finder
version installed by using the “Get Info” command.