Apple really did have to push the (Motorola) G4 way more than they'd have liked. A 1999 G4 was a 400MHz G4 on a 100MHz FSB. By the 2003, when they were done wi

Apple really did have to push the (Motorola) G4 way more than they'd have liked. A 1999 G4 was a 400MHz G4 on a 100MHz FSB. By the 2003, when they were done with Motorola and and onto the IBM G5, they were running a pair of 1.25GHz G4's on a 167MHz FSB... I'm sure it was possible to get a lot of speed out of workloads that ran out of the on-chip cache, but I'm equally sure that it was easy to wind up constrained by memory bus bandwidth. I tried to convince myself to buy one and switch to OS X, but couldn't get past the architectural limitations. (Which were worse because I'd also have wanted to run Windows under emulation.)