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!