Now I'm not entirely sure whether not not pcpp does this or not, but you have to remember psus aren't 100% efficient. Your psu is 80+ gold, which means it shouldn't be less than 87% efficient, which would put your psu at around 566 watts minimum.Now you might get a little more than that due to legal reasons to under-sell or something.
But if pcpp accounts for that then you should be good.
Also used another website to get a second opinion. http://outervision.com/b/QJTGj4
Last edited by Trenchguns; 07-05-2016 at 12:53 AM.