I have same model SS-750 KM over about 1.5 year. I decide to leave that excellent unit for me like reserve PSU.
Silent, stable, little hotter because work almost always in fanless mode except during summer when I play games longer.
Only cables are not all black and I don't like that and that Seasonic X sticker on one side is annyoing same like cables like abnormal people make that upside down...
I leave for reserve because I can't fight with cables anymore, sleeve or not sleeve, suffering with sleeving or buying finished never so good, in future only PSU with cables like NEX1500, nothing else.
But that is far future because I have for next few years.