It was my belief that the 9500s have two PCI buses rather than two internal SCSI buses. A 9500/132 was my first PPC Mac. For that reason I retain a soft spot for the model. It's an abstract soft spot, however, because it is a brutish and simultaneously fragile machine. The structural plastics turn brittle and break even as you look at them. The effort of replacing RAM or battery doesn't need to be laboured. What inspired Apple to clad the Mac in metal and use plastic for its skeleton, instead of vice-versa, can only be guessed. Nonetheless, I had mine running reliably as a G3/400MHz/1GB/45GB for three or more years. Now it has surrendered its jewels to a Kansas 9600.

Nonetheless, there are eternal truths of the machine that an owner ignores at his peril. Of themselves they may not cause instant death and damnation, but, compounded with each other, lead to sleep-deprivation and compulsive nailbiting as a minimum.

RAM. Fill the slots, paired, with only 1.100-inch FPM DIMMs of 70ns or faster, from A6/B6 towards A0/B0. That will relieve you of one impulse towards suicide.

Place a PCI SCSI card nearest the processor (A), ethernet in B, USB/FireWire in D, and video in F.

Count your watts-per-card carefully. The 9500's PS is not nearly as well-endowed (maximum is 90W for all slots) as that of the 9600 (or even a Quadra 950).

This may provide some good reading, and this for afters.

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