> Are there any simplified formulas that would predict how much faster
> one could expect a Mac to run, by increasing the CPU speed? e.g., as a
> function of system bus speed? PCI slot speed? ATA/SCSI drive speeds?
>
> According to MacTracker, B&Ws have a 100 MHz system bus ... not so
> much a bottleneck as my older 50 MHz bus PPC 8500/9500 that I have
> installed a Sonnet G4/450 and G3/500.
>
> I'm wondering about speed improvements that a Sonnet G4/1GHz might
> make to such a system.
Think the Sonnet G4/1GHz reduces the bus speed of the B&W's to 66 MHz so it may
not be the way to go. See:
<http://www.xlr8yourmac.com/G3CARDS/G3_1.1GHz_vs_G4_1GHz_review/index.html>
Bearfeats also has some other [dated] comparisons:
<http://www.barefeats.com/G4shoot.html>
I gave up trying to speed up my B&W given the cost of such upgrades. I got a
G4 DA (133 Mhz Bus) and a 733 Mhz upgrated for it for $170 shipped. I still
have three B&W's and if upgrades ever come down in price I may put one or two
back in service.
Still have my trusty 50 MHz bus mac's a 7300 with Sonnet G4/450 for an iTunes
server and a 7500 with an XLR8 G3/500 used for writing this reply. --glen
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