Old post, but I have the Amp Extreme 1080, with a 6700K i7, mine runs like a boss at 1440p, nothing I can't max out. I mostly play Fallout, really waiting for Skyrim remastered, but my boost clock has gone all the way to 2061, well above advertised boost of both Asus Strix and Zotac AE, so any other card too. My personal max normal operating temperature is always under 65*C. Fallout never drops below 60fps at 1440p.
Only issues I have are with WoW's old unoptimized crap, which I had to adjust some settings, but I am able to run with everything maxed, except render scale (100% down from 200%) resolution scaled up to 4k, and environment sliders down to 8 (from 10) also never drops below 60fps.
League of Legends has a problem rendering, but that is because my GPU is rendering it faster than it can be displayed. Capped frames at 120 and turned on "wait for V-sync" and that seemed to help.
But any game I play runs smoother than butter.
Zotac has best PCB on the market, and some top notch cooling, massive heat sinks and 3 fans. Like I said mine never gets above 65*C and max the fans run is about 25-30%, so super quiet too.
Only issue is size and weight, and it is power hungry like a boss.
You'll need a good PSU, and a GPU brace for sure so you don't damage your PCI-e slot.