Editing PowerPC G4 (section)

==PowerPC 7450==
[[Image:XPC7450.jpg|thumb|150px|An 800 MHz (Fast) Motorola PowerPC 7450 on a Power Mac G4 CPU module]]
[[Image:PowerPC G4e.png|thumb|right|250px|PowerPC G4e design]]
The PowerPC 7450 "Voyager"/"V'ger" was the only major redesign of the G4 processor. The 33-million transistor chip extended significantly the execution pipeline of 7400 (7 vs. 4 stages minimum) to reach higher clock speeds, improved instruction throughput (3&nbsp;+ branch vs. 2&nbsp;+ branch per cycle) to compensate for higher instruction latency, replaced an external L2 cache (up to 2&nbsp;MB 2-way set associative, 64-bit data path) with an integrated one (256&nbsp;KB 8-way set associative, 256-bit data path), supported an external L3 cache (up to 2&nbsp;MB 8-way set associative, 64-bit data path), and featured many other architectural advancements. The AltiVec unit was improved with the 7450; instead of executing one vector [[permute instruction]] and one vector ALU (simple int, complex int, float) instruction per cycle like 7400/7410, the 7450 and its Motorola/Freescale-followers can execute two arbitrary vector instructions simultaneously (permute, simple int, complex int, float). It was introduced with the 733&nbsp;MHz [[Power Mac G4]] on 9 January 2001. Motorola followed with an interim release, the 7451, codenamed "Apollo 6", just like the 7455. Early [[AmigaOne]] XE computers were shipped with the 7451 processor.

The enhancements to the 745x design gave it the nicknames '''G4e''' or '''G4+''' but these were never official designations.