Originally Posted by gonzo
I am sure that the MacPro is running a 64-bit OSX. Which means the chipset is the limit (8GB) The same chipset can go to 64GB.
I thought there was a 64-bit OSX for the G5...but I am pretty clueless about the G5.
I would guess that all the intel macs execpt the MacPro are running the 32-bit OSX
The Mac Pro is running 64bit OSX and actually supports up to 16GB. The new XServe supports 32GB. The G5 Power Mac (of which I own two quads) is also running 64bit OSX and it has 8 DIMM slots and supports either 8 or 16GB. 8 for sure as I have 8GB installed in one and 4GB in the other, I don't know if it supports the 2GB modules and can address more than 8GB though.... 64bit OSX also runs on the iMac G5 which allows for installation and full addressability of 4GB. It's a shame that the switch to Intel in the iMac and notebook lines actually took us a step back in the memory department. Admittedly, most people don't need 4GB in a notebook or iMac configuration right now and while I'm doing a lot of whining, I suppose I can live with 2GB if need be. Which is probably what I'll have to do because I can't wait much longer to be mobile again. The Dell notebook is definitely out of the question now... Same RAM limitations as Apple or anyone else, but no TMDS dual-link support on their Quadro 2500M even though it should have it.