This is GREAT guys!
Answers please to these concerns -
>>1) is the pin configuration the same on the 300Mhz 603e and the 100Mhz 603e.
> The second is that the 100 to 133 MHz 603e speed grades use a 3.3V supply
> for I/O pins and 3.3V for core logic supply. The 166 MHz and up versions
> use 3.3V I/O and 2.5V core logic. This is a BIG issue, and one I didn't
> think of before you mentioned this.
>
> Unless the designers of the Duo motherboard provided a special plane for
> the core logic supply and provided a split point where it can be cut away
> from the 3.3V supply (thus allowing you to substitute power from a 2.5 volt
> regulation circuit), I'd say this is probably insurmountable.
>
> It's possible that the chip may operate despite the increased core voltage.
> However, you then run into a big power problem. The power used by a CMOS
> device is proportional to the square of the voltage, so an estimate of the
> increase in power is to multiply the quoted power use by 3.3^2 / 2.5^2 =
> 1.74. The 300 MHz 603e normally uses 4 W average. 4 * 1.74 = ~7 W. Not
> good.
>
>>2) will the bus speed of the Motherboard allow a 300Mhz upgrade.
> To make 300, you probably do need to overclock the bus.
The 6500/300 runs a 50MHz bus speed. There's a guy named Marc Schrier who
overclocks 3400s and stuff.
>
>
>>5) Apple tech's should have all of the necessary tech data on the 300Mhz
>>603e. Investigation could start there.
Where do we get this tech data?
>
> Motorola's web site has everything relevant.
>
> http://www.mot.com/SPS/PowerPC
>
>>6) is the physical size of the 300Mhz 603e different?
>
> The die may be a different size but the packaging should be the same.
> Provided that you're talking about like packages, of course.
Motorola does currently make 603e at 300mhz in CBGA
>
This is good!
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