Minimum requirements for 60fps?

So I'm trying to build a gaming pc on a tight budget to basically just run league at a minimum of 60fps. I'm a big newbie when it comes to pc parts (and there's so god damn many), so I'm really not sure what to get in terms of a graphic card that I can pair with a 3.0ghz i3. Everything else I can figure out myself on pcpartpicker.

Not willing to spend more than $600 Canadian on the full build.

TIA!