yes it s powerful and loud but it isnt cheap 4010 noise due to bad bearings. i m honestly amazed after seeing how powerful this tiny fan is. this can be used for part cooling it is that powerful. in marlin where you set e0 auto fan pin, under that section you can limit the power so no need to use buck converter.
Noisy Does not match description, A strong fan however is not at all suitable for installation on an extruder because of the vibrations that come with the high RPM Maybe it would fit in with something else