On Mar 1, 2004, at 05:14 pm, Tom Tubman wrote:
Mobos were 50MHz for the 8600 and 9600 series.
Mine is 46.7MHz.
Right. You have a 9600/233. Luckily, your motherboard can go up to 50MHz with no problem as that was the spec for all the MBoard components in the 7300-9600 PowerSurge series (though some 256k L2 caches from the 120 MHz models can't do more than 45 MHz, but they can be replaced). For a 233 MHz CPU, the supported bus multiplier was 5x: 233 � 5 = 46.7MHz.
Data path between the CPU and cache was 100MHz as you said but drops down to 50MHz for the memory and the rest of the machine. I suspect the PCI controller was the same "cruddy" one that others complain about in the 7300-9500s as their PCI ATA throughput is still limited to ~24 MB/sec reads and ~17 MB/sec writes.
I forgot all about that. Didn't early ATA cards have major issues with that PCI controller being mistimed and causing corruption?
I experienced no corruption with any ATA cards and I had many of the early models (TurboMax ATA/33, etc.) in many different Macs and clones. They merely ran slower than the rated 33 MB/sec on machines older than the Beige G3 and were never officially supported.
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