SuperFlower are one of the best manufacturer's, and provide the platform for many great "brands" of PSUs, although the Leadex Silver line is a bit cut down from the Leadex Gold line (which is what's used in things like the EVGA SuperNOVA G2).
You won't find too many reviews, as (I believe) it's limited to 230V countries, so the "big hitters" like JohnnyGuru etc haven't reviewed it.
With a bit of basic detective work, it appears it became available in late 2015.....at which point Skylake had launched.
So a quality PSU OEM and a Skylake-era release date..... I'd be very, very surprised if it didn;'t support Haswell's Cstates (ie Haswell certified).
http://www.jonnyguru.com/forums/showthread.php?t=12704