I've got a G5 tower here and I'd like to find a PCI sound card for it. Problem is, I can't seem to find anywhere that explicity state they are Mac compatible. I don't want to use the optical output, it stops me from being able to adjust system volume using the keyboard (I have to control the volume directly from the speakers (Logitech Z-5500.)) I've found some cheap stuff on eBay (http://www.ebay.com.au/itm/4-Ch-C-M...36889786?pt=AU_Components&hash=item4a9b86e8ba) but I don't know if it'll work. The card I linked to appears to have a C-Media chipset, I have one of their cheap USB 5.1 cards I also got from eBay and it does work.