Re: Hello, I have a PC with an AMD FirePro V5900. I would use it in After effctes cc. Is it possible? Or only NVIDIA cards

This is correct but the GPU is only used for Ray-traced rendering, which was a nobel experiment but is no longer being developed. C4D, included with AE in a lite version does the 3D thing much better than the Ray-traced rendering option. If you are using CS6 or CC and you want to do some of the Ray-traced rendering tricks try the AtomKraft rendering engine.