I am totally lost. What are the differences between the slew of GTX1080's that are on offer? I believe the 1080 FE cards are all identical no matter which one you pick. correct? So whats the main differences with all the others? I'm assuming they have different cooling systems and power options, but if Nvidia are limiting the max voltage, does it really matter which card I buy? What I mean is, could I go with the cheapest card (which the best cooler) and simply crank up the voltage to reach 2-2.1Ghz?