im not sure yet. i only used it for the first time in a month a few days ago since i waited for the graphis card . Just trying it again and pressing lightly on the psu shroud it suddenly shut up. im gonna try reseating the psu . its only 1 month old so i guess i can return it if it gets loud again.
i had real bad Luck with psus for many times in a row now i hope this one stays working rmas is alot of work.
thanks for your advice johhny guru.
i just took the psu out of the case and the 0 rpm mode is working and its quiet again. stopping all other fans i still had fan noise . turns out this was coming from the 2.5 hdd mounted on same side as the psu shroud. i Heard loud hdds Before but never heard one like this before it had sound like just a slightly loud fan.
sorry corsair this is a good quality psu.