Yokemate of Keyboards
Posts: 4976 from 2009/1/28
From: Delaware, USA
I don't know about apple's G5, but NXP's e5500 and e6500 cores seem to be able to concurrently support both 32 and 64 bit code.
At this point, even if you didn't want to pursue SMP, the possibility of rewriting some parts of the OS to use the additional memory and cores would be possible with no compatibility issues I can think of.
"Never attribute to malice what can more readily explained by incompetence"