The two 140's that work perfectly fine i kept for intake on my case
Out of 5 140 masterfan pro air flows, three rattle. All three rattle mounted horizontally and one as well rattles vertically. Just requested a refund for those three. Kinda hard to use them on my radiators when they rattle so terrible. As well ordered one 120 air flow to use as exhaust in my case. It too rattles both horizontally and vertically. Issued a return for another 120 air flow. Cooler master has always been my go to for fans and this is the first time i've had complaints with their fans. I love their blade master, sickleflow, and silencio series. As well loved their excalibur series back in the day. Never used their jetflos so these are my first time with their pom bearings... The two 140's that work perfectly fine i kept for intake on my case. They work exceptionally well. Very quiet even at performance and moves a ton of air.Edit:my 120mm air flow replacment rattles as well. When i press just lightly against the fan hub while its spinning, it stops. Which tells me the blade assembly is not properly aligned and sealed onto the motor. The qc of these fans are atrocious and seriously saddens me cooler master would release such poor qc fans. I updated my rating from three stars to two stars because of this. Now i'm considering requesting a refund. I feel horrible for outletpc but what can i do? I paid for non-defective fans and recieved defective ones. Out of seven fans total now, only two came functional.Edit again:so the two front fans i said worked fine? They now are starting to rattle. One rattles constantly and the other every now and then. I'm sending them back and updated my rating to one star. I really tried hard to see if it was user error, but its not... If i press gently on the fan blade hub the rattling stops. The fans simply get off balanced.