Just in case anyone's considering making the upgrade from a Z3 (the world's first programmable computer), I've calculated the MHz increase you would see.
Z3: 5 Hz
Mac Pro: 4 x 3 GHz = 12 billion Hz
Benefit of upgrading: 11,999,999,995 Hz
(Sorry to perpetuate the MHz myth. And I realize the Mac Pro also has better graphics.)
See:
http://www.zib.de/zuse/Inhalt/Kommentare/Html/0680/0680.htm
http://www.theregister.co.uk/2004/06/02/zuse_computer
http://en.wikipedia.org/wiki/Z3
Z3: 5 Hz
Mac Pro: 4 x 3 GHz = 12 billion Hz
Benefit of upgrading: 11,999,999,995 Hz
(Sorry to perpetuate the MHz myth. And I realize the Mac Pro also has better graphics.)
See:
http://www.zib.de/zuse/Inhalt/Kommentare/Html/0680/0680.htm
http://www.theregister.co.uk/2004/06/02/zuse_computer
http://en.wikipedia.org/wiki/Z3