January 24, 2014, 09:37:30 am
The Ti has better specs and performance ratings than the standard 780.
More VRAM allows for more space on the card for larger scenes (all other things being equal). So if budget does not restrict and the demand of scenes is such for most powerful, then the 6GB GTX 780Ti would probably be first pick now, followed by the Titan.
As of today's choice of cards mainly in the GTX range, some users may consider the ATI R series as another option, but they do not seem to have quite the same performance ratings so far.