On Sep 7, 2010, at 1:53 PM, Dan wrote:
Does having a 100mhz FSB vs 66mhz one make such a massive difference?
Yes.
And you can CHANGE the speed of the iBook bus from 66MHz to 100MHz,
this was an ARTIFICIAL limitation done by Apple so that the original
iBooks would be slower than the PowerBooks that were currently being
sold. Those 500MHz iBooks are effectively UNDERCLOCKED. In most cases,
if you're going to change the bus speed back to it's NATURAL 100MHz
speed, you can also safely overclock the 500MHz CPU speed to 600MHz,
especially if you get some of that diamond heat paste. The overall
speed increase should be substantial, perhaps 40%, and raise the iBook
at least to the level of the ThinkPad, assuming they're both running
OS X? If they're both running OS X, the iBook will also suffer from a
10% hit to speed caused by the way OS X is optimized for Intel CISC
CPUs instead of PPC RISC CPUs which results in wasted cycles on all
PPC Macs under all versions of OS X, which was ported from the Intel-
based Next code. This will always make Intel machines running OS X
have a slight advantage, but nothing like the 33% FSB issue you're
dealing with.
Here's some links for info:
<http://www.xlr8yourmac.com/systems/ibook_2001_overclock/ibook_2001_overclock.html
>
<http://unsanity.org/archives/000044.php>
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