Minimum specs to get a solid 60 FPS on Maximum?

[InVizO]

I built a PC this weekend...

i7-4770k
16GB RAM @ 1600
Radeon R9-280X (the new rebranded 7970) & Catalyst 13.11b

I thought this would get me a rock-solid 60 field FPS, but it often hovers at 40-50.

I'm still at a point where I can return things. What should I improve to boost my FPS without turning off any graphics settings? Am I at the limit of my HW without overclocking? Do I not have something configured right?

Thanks!

don't listen to the others about the game being CPU limited. I'd be surprised if you are getting even 60% usage on your card or your CPU. What is being limited is the game being on DX9 and not being able to take full advantage of new hardware. Best you can do is leave it maxed out and disable shadows when lots of players come on screen