On Apr 11 2005, at 11:22, [EMAIL PROTECTED] wrote:
In a message dated 2005-04-11 4;56;44Mrng, [EMAIL PROTECTED] writes:
<< Yes and no. This depends on the Grackle chip on your motherboard. It's
the little one above the ZIF socket. It will have MPC106ARX66CG or
MPC106ARX83CG printed on it (may actually start with an X). The 66 or
83 within that string denotes the maximum rated speed of the chip.
Earlier G3 boards have an 83MHz controller, later ones have a 66MHz one
as a cost saving measure, and as such are highly unlikely to manage an
83MHz overclock. >>
VERY interesting. Just checked mine and it is 83. I assume yours is a 66?
Do you know what that chip does, exactly?
I've a rev 1 minitower with an 83, and a rev 2 desktop with a 66. Grackle (Motorola MPC106) is the memory and PCI controller. It's responsible for bridging the system bus and the PCI bus. I believe the system ROM also hangs off it somewhere.
You can also find this chip (at varying speed ratings) in the B&W G3, Yikes G4 and early iMacs.
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