I have a PowerMac G5 with two gigabit network ports on it, but one of them has stopped working. I am wondering if I can just buy a PCI gigabit network card and plug it in to one of the open PCI slots. If so, can I buy any brand? The one that is listed on OWC is like $90. http://eshop.macsales.com/item/Sonnet Technology/GE1000LA/ I have browsed through all of the ones on NewEgg and none of them mention support for Macs at all, much less a PowerMac G5. Will any generic PCI Gigabit card be supported?