> in terms of compute anything G5 is still king.

Just to add that in pure integer performance, e5500/X5000 trumps equally clocked PPC970/G5.

> If you want the top in GPU X and PCIe PMAC_G5s are on the same level.

It's PCIe v2 vs. v1 but I'm not sure about the real-world impact on MorphOS.