If you add an HDD an SSD and a DVD-RW drive your overall system wattage comes near to 530. !!!
http://pcpartpicker.com/p/v7gZYJ
Judging from the cooling options you chose, you may wanna overclock your system.
My suggestion: go for a 750Watt Power supply.
Also you may reconsider for the i5-4460 instead for the FX 8350 !!!
Judging from this: https://www.youtube.com/watch?v=JFqQdrs5wEU
Also whille the i5's are really performance processors, you have a more balanced system with your beastly R9 390 8GB GPU !!! (it costs almost the same)
(...to be true with that GPU, the most common would be an i7)
Example of a system: http://pcpartpicker.com/p/T9QwsY