So I never did get my dead PSU MDD up and running. It's just been sitting there doing nothing with (what I believe to be) a dual-1.24 G4 CPU.

I just got to thinking... would the CPU work in one of my Gigabit Ethernets? I have dual-450 and dual-500 models. The bus speed is a lot lower (100Mhz vs 167Mhz) so would that bottleneck the CPU to the point where it's not worth the upgrade? And would the stock PSU and fans be enough?

I don't really need the power but if the pros outweigh the cons then I might as well put that sucker to use until I get a replacement PSU.