Apple Performa 6400/180 - Manual (Page 56)

Specifications Processor - 2
Processor
CPU
6400/180, 6410
PowerPC 603ev processor
180 MHz
6400/200, 6420
PowerPC 603ev processor
200 MHz
6500
PowerPC 603ev processor
225 MHz, 250 MHz, 275 MHz, or 300 MHz