I tried to upgrade my 400 Mhz Pismo with a used 900 Mhz chip off of
eBay.
Couldn't get it to work.  It could have been a bad chip.  The seller
took it
back.  I am running the 550 Mhz G4 in it now with 10.4.  I've seen no
major
problems but it can run hot if it's pushed a bit.  Some of the faster
aluminium
G4 PowerBooks have trouble running Leopard.  I don't think I would
recommend
it for the Pismo, even with the upgrade. IMO you lose too much
performance,
not to mention the Classic environment.

On Sep 14, 10:41 am, Austin Leeds <[email protected]>
wrote:
> Just wondering, has anyone here upgraded to the Wegener Media 550 MHz
> G4 for the Pismo? I hear the G4 is a sweet deal and runs fine. The 900
> MHz sounds like it had problems. If anyone has upgraded, have they
> also upgraded to Leopard (installed with Wegener's special software)?
> I am curious to see how the Pismo runs with 10.5.
>
> Austin Leeds.
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