Power, Temperature, Noise
Cranking out the core speed to a Boostin' 1,163MHz means the voltage goes up, too. The large Classified pulls the highest power-draw of all cards. What's particularly apparent is that, on the very same platform, EVGA's GTX 780 requires an extra 100W over a reference Titan.
EVGA's cooler is massive, granted, but the company aims for the quietest gaming experience by optimising for an 80°C in-game temp.
And that dual-fan goliath does an admirable job of keeping a wattage-eating GTX 780 in check without making anything approaching a racket.
