I'm pretty sure that everything was exactly the same - all he did was
cut two microresistors and then solder bridge another two of the six
available positions and the eMac immediately stopped being a 700 and
became a 1.33GHz. It displayed that information and AFAIK it was
exactly the same chip. The only difference was that the chip ran
slightly hotter but still well within any safety margins and was now
expected to last a mere 700 years instead of several thousand,
according to the site with the hack instructions. :-)
It seems like a quick and dirty way to achieve model differentiation.
Andrew Fildes
afildes@xxxxxxxxxxxxx
On 11/03/2007, at 2:47 PM, Jan Steinman wrote:
> I wouldn't attribute it to "naughtiness." Rather, Apple builds a
> board capable of supporting a number of processor speeds, as
> determined by the chip manufacturer's guidelines. If IBM tells Apple,
> "This chip is rated for 1GHz," Apple sets the clock speed via jumpers
> or resistor packs to 1GHz. It may well be that the processor that is
> rated 1GHz may be capable of running at 1.25GHz or even 1.5GHz, but
> Apple nor IBM can support it at speeds it was not intended to run at
> -- you have to pay more for the chip that is rated for the higher
> speed if you want support at that speed.
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