Nice build however I have 2 recommendations: you can change the mobo to a standard atx form factor(yours is mATX) and also you can switch out the graphics card with a r9 390 as it will perform a little better.
Also I doubt that need a very beefy cooler to reach 4.5 ghz. I have a fx6300 and with the Arctic freezer a32 (212 evo equivalent) I have it at 4.72 ghz with a vcore of 1.493 and the highest temp with prime95 was 52 degrees
I would recommend you to get an i5 6400 with a cheap z170 motherboard like the asrock pro4 and overclock it with bulk. If you still want to get an amd processor then a good motherboard would be the gigabyte 970a ud3p which is around $90.