So your GPU has no trouble running at max settings, as long as you drop them to medium-high, oh well in that case...
I have a 2560x1080 set-up too and my over-clocked and water cooled GTX780 can't max out every game and neither can my R290 rig using this screen, I am actually thinking of moving to 970 SLI ATM.
What games can't you max out? (and like I said, I don't use aa as it isn't really needed at this res. + sweetfx does a better job with no performance hit)
Only game where I have to drop settings a lot is crysis 3. No problems at all with far cry 3, metro last light (obviously with physx turned off), bioshock infinite, tomb raider, batman arkham origins, dead rising 3, watch dogs (although I use those mods on guru but then they also make the game look better than vanilla...) etc.
And this is with an i5-750 bottlenecking my 290 big time so when I get an i5 DC CPU, minimum and average FPS should be even better especially when running mantle.
One top end GPU is not more than enough for many of us running 144hz monitors. It may be fine for you but 2 stock 970's use about the same power as some single cards and give you nearly double the FPS.
SLI 970's now mean I don't have to buy a new PSU either.
Yup like I said, the only time I would worry about power consumption is if I had a weak PSU.
I see your point about 144HZ displays. That is why I am waiting for an appropriate gsync/freesync monitor, get buttery smooth performance even with 60HZ/FPS
Like I said, my observation was more the irony of people who are praising the power consumption area when this wasn't an issue before and these same people still overclock to the very max they can even though there is no need for it and yet they still say they care about TDP....
All of a sudden people are now concerned about power consumption when they haven't batted an eye lit for any of the previous GPU's which sucked juice like crazy.
For the people who need SLI/crossfire for the extra FPS @ 144HZ/4k res., I can see the advantage of lower power consumption for GPU's.
Don't most people have at least 700W PSU's these days as well though? Well the ones who have dual 780's and especially 290's do anyway
