It's not dual 12v rail and they stuck the label on upside down. However Seasonic make blumin' good PSUs that well out perform what it does say on the label. I was attempting to power a RYZEN 5 and a VEGA with a BeQuiet System 9 500 dual rail PSU. Under load it went on strike so I got the Seasonic.
Make sure you get a case with a shroud so you can hide the cables, there are a lot of them and they are nice and long.