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Yokemate of Keyboards
Posts: 12058 from 2003/5/22
From: Germany
> For my understanding, it's just a matter of the used CPU. If it couldn't be managed to get
> the 7400 running, a cpu upgrade should help. As pega-1 pointed out in one of your given
> links, the support of Powermac 3,1 to Powermac 3,3 doesn't mean that it is supported with
> its original cpus.
I think you misunderstood what he wrote. Here's the relevant part:
"...PowerMac G4 support including models PowerMac3,1 to PowerMac3,6 with the requirement of [...] at least a 500MHz cpu card. The cpu part is still a bit open since we don't have machines with < 1GHz G4 CPUs for testing really and there are some known problems for the original low end 350/400/450/466MHz cards found in PowerMac3,1 to PowerMac3,4"
So it's seemingly not a matter of the type of MPC74xx (MPC7400 or MPC7410 or whatever) but a matter of the clocking, for whatever reason which pega-1 didn't explain. At least that's how I've understood his statement. In detail this would mean:
PowerMac1,2 (MPC7400):
- not supported: 350 and 400 MHz
- supported: none
PowerMac3,1 (MPC7400):
- not supported: 350, 400 and 450 MHz
- supported: 500 MHz
PowerMac3,3 (MPC7400):
- not supported: 400 and 450 MHz
- supported: 500 MHz
PowerMac3,4 (MPC7410):
- not supported: 466 MHz
- supported: 533 MHz (as well as MPC7450 at 667 and 733 MHz)
PowerMac3,5 and PowerMac3,6 (MPC7450 and MPC7455(B)):
- not supported: none
- supported: all
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