On Mar 2, 7:01 am, K K <[email protected]> wrote:
> TOPIC: Pismo CPU type
> numbers?http://groups.google.com/group/g-books/t/bdca0501e6d6c990?hl=en
>
> Hi- to clarify please-
> I asked about the Pismo Processor of 500 mhz and a CPU type of: PowerPC 750
> (83.0) and another with PowerPC 750 (42.2).
> Thanks to PeterH for the reply. (I have edited it to the G3 content as I am
> trying to understand), based on this information, which processor card do I
> want then, the one with 83.0 or the one with 42.2 in the CPU parentheses?
> Thanks.
>
> == 2 of 2 ==
> Date: Sun, Mar 1 2009 7:25 am
> From: PeterH
>
> Just as there are a great many Intel processors (Non-Core Pentium, Core
> Pentium/Core, Core 2 Pentium/Core 2 [ * ] , Core 2 Solo, Core 2 Duo, Core 2
> Quad, etcetera) there are many IBM Power processors....
> G3 processors include several 750s, and some later ones, too, such as the
> 500 and 1 GHz examples...
>
> Early G3s, particularly the slower ones, were fabricated using aluminum as
> the internal conductors. Later G3s, particularly the faster ones, were
> fabricated using copper as the internal conductors. As these are CMOS
> processors, the lower resistance of copper facilitated making faster
> processors while maintaining its temperature, for otherwise a chip's power
> consumption increases as a function of its clock speed.
>
> A 750 is a 750 is a 750, but the later revision (sometimes called "step", or
> "stepping") may indicate a revised and/or improved process, which may also
> indicate a technology shift. But, it doesn't indicate a change in
> compatibility. Apple controlled its processor cards quite tightly, and a 750
> of whatever revision is entirely interchangeable with a 750 of another
> revision.
>
> Apple made its early "New World" laptops with the chipset on the processor
> card. When you change the processor card, you are also changing the chipset.
> This is not true of the desktops, where the chipset remains on the
> motherboard.
Like Peter said, it won't matter. They are completely compatible with
each other. So if you were to get yourself a replacement processor,
you would only want to be concerned with getting a Pismo compatible
processor card. Aftermarket cards will quite likely have a different
set of revision numbers. At best, the number would tell you that a
processor is slightly newer than another one, but is insignificant
enough that it will make no difference to compatibility or
performance.
Bucky
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to Low End Mac's G-Books
list, a group for those using G3 iBooks and PowerBooks (we run a separate list
for G4 'Books).
The list FAQ is at http://lowendmac.com/lists/g-books.html and our netiquette
guide is at http://www.lowendmac.com/lists/netiquette.shtml
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/g-books?hl=en
Low End Mac RSS feed at feed://lowendmac.com/feed.xml
-~----------~----~----~----~------~----~------~--~---
