Well, AMD's processors are all pretty old, which you can tell just by looking at the lithography : /
So here's what I suggest: I suggest you get an i5-4460. It's a solid CPU that will run that graphics card no problem, and even allow for upgrading room up to a 970 before you start seeing bottlenecks (though very few right above a 970). If you're on a strict budget however, an i3-4170 will do just fine. Keep in mind though, these are all 4th gen Intel chips, the newest generation (6th gen) also has some processors very similar to these, like for example the i5-6500 is basically the i5-4460, and the i3-4170 is very close to the i3-6100. The reason I didn't recommend them however is because they will be a little pricier. This is because of the CPU itself being a bit more expensive going 6th gen over 4th gen, the newer motherboards being a bit more expensive, and the newer DDR4 RAM being more expensive. If you're on no tight budget though, Skylake is definitely a good choice. Keep in mind though that doing something like getting an i5-6500 over an i5-4690k isn't a great idea, since the 4690k is the better chip since it can be overclocked.