google "TDP gtx 1070" : 150W, maybe 200W with overclock
google "TDP ryzen 5 1600 " 65W, that goes up to 95W at 1600X frequency, and more if you OC it more.
rest of system is less than 50W, ---> 50+ 95 + 200 = 345 at peak
So 500W is plenty, so is 400W. But do use google to cross check power consumption rather than relying on forum posts. Sometimes people get it wrong.
FWIW QUALITY of the PSU is as important as output. I use seasonic g-series, cheap and very nice specs. I did not check for reviews on the EVGA. You should.