Hi everyone, I've just taken out an old G5 from my cupboard as in saving to buy a new Mac Pro. (Get used to OS X again) It's a tad slow so I'm trying to speed it up where I can, I've upgraded to 4GB ECC, although only 3 is showing :-( and trying to find a copy of Leopard. What are my options for the CPU? It's a single 1.8GHz at the minute, can I chuck a second CPU in there??