These fans are worth it, they are silent and push air in. There is no coil whine, its so soft you can mistake it for a breeze. The quality of these fans are great, they come with 4 screws and you can daisy chain them.

If you want a good case fan that does not break the bank and you want 140mm fans with good quality, good sound and no coil whine, get this.

Really solid build quality! And quiet and pairing with C8 PC case running 4 of them, help keeping the 9800X3D cool, clocking at 4.9Hz stable.