Andrew Grebneff wrote:


Yep, unless I'm reading the markings incorrectly, it's a 450.

I have tried booting it at different speeds, no joy.

The only things I can think of that *might* make a difference are:

The original had 512K, this has 1 Meg of cache
The chip itself is IBM marked, not Moto like the original.

These things shouldn't make a difference, but with all things computer, often there is no spoon.

I can list all the print on the chip and card if it might help. I'm at a loss as well as frustrated with this.


I tried installing a 400mHz *G#* ZIF in my 300 B&W. Set the jumpers correctly. No boot. Just wouldn't work. Sold the ZIF, no complaint that it wasn't good.


The ZIF probably wasn't the problem. Some B&W machines were purposely crippled by Apple via the firmware so as to not be able to run a G4 processor. You can probably read more about this at XLR8yourmac.com .
As I remember it, the issue can be fixed with a firmware flash.


JR


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