The fastest PowerPC CPU used in a mass market computer was the 2.7 GHz G5 processor used in the PowerMac G5 around 2004-2005

There are other variants of the PowerPC architecture at a variety of speeds.

http://en.wikipedia.org/wiki/PowerPC/Types

PowerPC processors can only be used in computers or peripherals that were originally designed to run them. Some computers that have PowerPC or PowerPC-based processors include:

* Macs made between 1994 and 2005 * The Pegasos and Pegasos II (a desktop computer designed for operating system developers) * the EFIKA (a motherboard for embedded systems) * The GameCube uses a custom PowerPC-compatible CPU * The Wii uses a custom PowerPC-compatile CPU based on the one in the GameCube * The Xbox 360 uses a triple-core PowerPC-based CPU * The PS3 uses the Cell processor, which is based upon and mostly compatible with PowerPC processors. * The AmigaOne, a computer designed to be the successor to the 68k-based Amigas.