that motherboard is a little overkill. the power supply cannot handle three video cards if that is the reason for the motherboard. there are cheaper motherboards based on that chipset that will play just fine.
a suggestion http://www.newegg.com/Product/Product.aspx?Item=N82E16813157636&cm_re=z170-_-13-157-636-_-Product
for the price you are paying for that power supply you could get a more powerful evga supernova G2 650W for 99.99 at newegg
tier 1 highest quality and more power in reserve for the future. 10 yr warranty