Just to give my brain a workout in the morning, I calculated the theoretical ram throughput on my Performa 6360 for comparison. Apple specifies 70ns or faster ram, so that means a clock of ~14.3MHz. 64-bit FPM 5v DIMMs are used in individual banks in this machine, so it's 64 bits wide. 14.3*64/8= 114.4MB/s. Later SDRAM models such as my Beige G3 would be 66*64/8= 528MB/s at maximum. This, of course doesn't take into account latency and overhead between PCI and RAM.