Is a gtx1060 6gb able to run an ultrawide 3440x1440 monitor at 60fps?

Solution
If you have not made a purchase the newly released GTX 1070 Ti will do the job for you and is less expensive than a GTX 1080.
hang-the-9 was correct in stating it depends on game settings [how much eye candy you want to see].

Personally, I suggest a GTX 1080. An AMD Vega will also do the job, however, it requires almost as much power from the wall as does a GTX 1080 Ti.

The following man tells the truth on YouTube. Please note the following Youtube review is using early drivers, and AMD drivers mature well over time. [I am using an MSI GTX 980 Ti Lightning, so, I am not an AMD fanboy].

https://www.youtube.com/watch?v=flekUCK9O2g