Wait, let me get this straight. You come here proudly talking about how you registered just to tell us how wrong we are and you are 100% right, and you don't even know how efficiency works? Seriously? Any real PSU outputs what it claims to output. If it's a 400W PSU, it outputs 400W. Not 70% of 400, not 82%, not 85%. 100% of that 400W.i saw one coolermaster which is 400w, and there is no 80+ bronze thing, so with simple math it can provide around %70 efficiency you dont need be genius to calculate it.
400 times 70/100 : 280 watt. in video he demands 320 watts. so what?