I hesitate between GTX 770 2GB and 4GB for 3ds max landscape scenes - do I need more VRAM and what exactly does the VRAM - will it improve the rendering time or the viewport speed - the differences in price is not that much but some says that when it comes time to use it, the GPU will be so slowly that I will have to change it because it`s 256 bit. Also what do you think about two GPUs x 2GB - as far as I know it does not improve the rendering time by 100% (/2) but about 70% and it`s better not to use them is SLI when rendering, but will a two GPUs in SLI mode improve the viewport speed?
Thanks in advance!