Just for fun I ran ragemem via os4emu on my Powermac 3.4 with MaxPower G4 7448 @2GHz installed. Here are the results:

RAGEMEM v0.37 - compiled 11/06/2010

CPU: Unknown 0.0 @ 1999 Mhz
Caches Sizes: L1: 16 KB - L2: 1024 KB - L3: none
Cache Line: 0

---> CPU <---
MAX MIPS: 5982

---> L1 <---
READ32: 7606 MB/Sec
READ64: 15209 MB/Sec
WRITE32: 6518 MB/Sec
WRITE64: 5072 MB/Sec

---> L2 <---
READ32: 2166 MB/Sec
READ64: 2560 MB/Sec
WRITE32: 2445 MB/Sec
WRITE64: 3348 MB/Sec

---> RAM <---
READ32: 276 MB/Sec
READ64: 276 MB/Sec
WRITE32: 804 MB/Sec
WRITE64: 810 MB/Sec
WRITE: 752 MB/Sec (Tricky)

---> VIDEO BUS <---
READ: 32 MB/Sec
WRITE: 180 MB/Sec