Where can I download cinema 4d plug-in so that I don't have to deal problems with separate material files ?

I was really impressed with the performance of demo Octane render. I have GTX 470 video card and used Cinema 4d to create image with size of 5k x 5k to 10k x 10k or more to create poser size image.
I was wondering if GTX 470 can handle this high resolution. If not, is it possible to create four ...