would 2 140mm fans as pull with 3 120mm as push be beneficial?

[CHEESYnachoMAN4]

I am getting a new gpu that has a 360mm aio, and I plan on installing it in the front where the current 3 140mm intake fans are. Since I will have those fans lying around would it be beneficial to place 2 of the 140mm fans on the other side acting as a sort of pull fan once the radiator is installed? If so, would a 140mm to 120mm bracket be beneficial?

[Bombastinator]

The rule is generally you get at most only 20% of the power of the second fan as additional cooling.  Twin fans are mostly useful when a single fan runs a bit too fast and creates more noise than is wanted.  Sometimes slowing a fan only a little produces a massive nois level change.  If the fans are already running slow, or so fast that a second fan won’t help enough, all they do is make more noise to no great useful purpose.  140s have a lot less static pressure than 120s too, so they may not even add much at all.