The DayStar Genesis MP was the first multiple processor Mac OS computer, introduced in October 1995 in a four processor version. It came in dual- and quad-processor versions based on the PowerPC 604 processor.
The PowerWave was a desktop computer with a 120 to 150 MHz PPC 604 processor. The CPU is on a daughter card for easy upgrade, just like the Power Mac 7500, 8500, and 9500.
The Performa 6300 (a.k.a. 6260, 6290, 6310) replaced the 6200‘s 75 MHz 603 with a faster 100 MHz 603e CPU. The 6300 was replaced with a 120 MHz model in April 1996.