Man, you guys are like broken records saying the same thing over and over. Dondan has tested this and we are taking his word for it. An open cooler type gpu makes sense considering there is no space in between the fans and the case vents.
That is the state of the "common" consumer. Misinformed and unwilling to do any research. Then they'll wait for reviewers to get information that's already out there. I guess 5 min of research is too hard for most folks. So many talks about the gtx 1080 not fitting, temps going out the roof, etc.
According to: Corsair SF 450 and SF 600 PSU Review, it seems like they make the same amount of sound, the SF600 getting louder obviously due to higher wattage, which you won't be needing.
Corsair SF450 PSU Efficiency, Temperature And Noise
Corsair SF600 PSU Efficiency, Temperature And Noise...