The power phases on that motherboard are not as good as I would want for a FX 8320. The ASUS M5A97 R2.0 is the cheapest I'd use, and ASRock 970 Extreme 3 R2.0 or Gigabyte GA-970A- UD3 or UD3P.
I would also want a PSU with better capacitors than that for a high-performance gaming rig. The Seasonic S12II 620 Bronze is significantly better and costs only $2.00 more. If you use rebates, there are other good choices at the same or less cost.