Hello. I am building a pc for video editing and composting a little 3d work. I will be using mostly after effects and a little premiere and c4d. My question is should I buy a Nvidia quadro k400 or a gtx 780ti. Price is not a problem. But it is not just rendering I care about. I also want fast preview times. I will only be having one or another in my system and no other card.
get the quadro k400. The cuda functionality on the GeForce cards is nearly disabled for use in rendering and 3D. However, be aware the cuda cores in the quadro card are not good for gaming. Sort of Nvidia's way to make it so that you need separate cards to game and work.