PPC 604E processors

[AJCopland]

Homer wrote:
Hmm, but would the 300Mhz cpu work at 233Mhz   :-?

Yes it would. The question being asked is, could you remove the 233MHz 604e CPU and solder in place a 300Mhz 604e CPU.

The answers are both yes, but the 300MHz cpu would only be running at 233MHz because the crystal which generates the clock frequency at which the CPU runs is only running at a speed AND multiplier that produces a 233MHz speed.

For this to work as the original poster wished they would have to replace the CPU with the 300MHZ _capable_ one, and then change the crystal and onboard multiplier to generate a 300Mhz cpu clock.

Andy

[AJCopland]

Framiga wrote:
nope, the multiplier goes to 5x (look at that page)

What's that got to do with the question that I answered? :-P

Andy

[AJCopland]

Lunarnut wrote:
Well my main point of asking was if I couldn't find a PPC 233 processor then could a find a faster Mac and scavange its CPU for an Amiga project. I would only run it at 233 Mhz.

Ah I see, well yes it will just run at whatever speed you set it to run at, I once booted a 300Mhz at 600Mhz due to poorly documented jumper settings. It will run like that... just not for very long :-o The clockspeed of a CPU is what it's supposed to be run at but you can feed it almost any actual clockspeed with varying side effects (like instant cpu death if its too fast).

Andy