Quick question

[Slater]

So i read about the EVGA GTX  780Ti Kingpin Edition card which is supposedly coming out this december or in january. It's also rumored to have 6GB of Vram and a few other cool changes opposed to the standard 780Ti. I also read here that there's no point getting graphics cards with memory bus' that can't fully utilise a card's VRAM so this brings us to my question:

 

Assuming the Kingpin edition does come with 6GB Vram, won't the 384-bit memory bus bottleneck the card like the 256-bit bus would with a 4GB GTX770?

[Najuno]

But due to the fact that nVidia uses a lot faster memory I´m sure you will not notice any bottlenecks at all.