I haven't seen my psu output more than 530w. 7700k @5GHz with 1.31v, 127% power target in the 1080 Ti, EK Dual D5 running at 100%, 4x Noctua NF A14s at 30%, 2x 1TB WD Black HDDs, and 2x 1TB muskin SSDs. I see around 430-480w output while gaming. If you go with a 600w psu get either a gold, platinum or titanium rated one. I'm not sire if their is a titanium rated 600w psu though.