Is 80% efficiant at all loads? I was under the impression that it is for typical load only, i.e. internet, office and some apps.
Efficiency has absolutely nothing to do with gaming and overall it has virtually nothing to do with choosing a PSU since it does not equal quality or performance.
those labels only tell you something about the efficiency of a psu they don't say anything about how good a psu really is.
80+ rating is good for marketing and was designed for businesses that run dozen or hundred machines, not home users with a single gaming pc.