> It was my understanding that the only differences between motherboards in
 the PowerSurge series related to the on-board video input/output
 capabilities (present on the 76/86/9600), and the cache architecture in the
 later (250MHz+) 86/9600 series.

Do they have the same cruddy PCI bridge?


I believe the six slot boxes use dual PCI bridges ie. upper three and lower three. Often issues in way that cards are stacked in them that causes crashes - reorganising often resolve problems. As to if they are same "cruddy" controller (but two of them) I don't know.

The also thought that MOBOs on mach 5 versions (250 MHz + 86xx, 96xx) ran at 60 mhz as well. I do know the data path runs at 100mhz - this maybe between CPU and cache only though. Similarly RAM must be 60ns or faster in these versions. This is part of the reason that the 350mhz versions were pulled from sale when 233/266 G3s were released as the older 9600 350 was faster than them - it was only when Apple got G3 to 300+ (fairly short time - I think two months) that the six slot 9600 was rereleased to sale for a period of time as people wanted the six slots still.

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