I tried installing the Demo of R12 and I'm having major problems. (I know some things may be answered with "because it's a demo", but I don't think that is my problem here).
I installed on my HP z800 Dual 6-core, 12GB Ram, 2TB drive space, NVIDIA Quadro FX3800, Windows 7. The machine was built for Avid Media Composer, but I'm also running many Adobe programs like AE very fast (although I close them all while trying to run C4D).
When I open C4D, as soon as I do anything, it hangs. If I try to pan in the empty perspective view port, it either freezes completely or takes 20 seconds to update. I have tried both the 32 and 64 bit versions, re-start, re-install, etc. I have to think it is either a setting or something with my gear that it doesn't play nice with.
I am hoping to get this solved so I get demo the program and hopefully buy it if it goes well. If anyone has any ideas or can point me in the right direction, that would be great!!!