Quote - Well, unfortunately i am the Mac guy here (beside a lot others of course) so i have not too much experience with Windows settings. I simply use an old Windows box because it is there.

It indeed can as well be the graphic card memory that overflows. Try to switch off OpenGL and see what happens.

You are lucky... a PowerMac G5 was my dream - but they started to use intel processors on them too :P

I am using an Asus N6600 PCI Express video card with 256mb of ram. On my scenes there are always a lot of objects imported from Cinema 4D and mixed ecosystems.

As you said its working slowly but its working. I guess I am asking for too much sometimes...