Must just max out at the 4gig stage with the 32 bit addressing (with the application on a 64 bit system not being hampered with the OS taking up any), as I said Ive had it up to 24mil (not that I was doing anything with it mind you or looking at the RAM usage) on a mesh and it was running fine then again that may have been knocking right at the limit and begging for a crash if I poked it in the face.

The thing it that Z dosent care about the GFX card in the slightest its all down to the processor and the RAM installed, hopefully z4 will be able to take advantage of oodles of RAM