My units can run at 1700 rpm, which gives about 102 CFM and 3 mm of static pressure, which is a lot for ARGB fans. About bearing: of the 3 fans bought by this company, one had a terrible bearing with a rattle, the second had a barely audible rustle, and the third was almost silent. At the same time, it was bought with a rattle at the beginning of 2022, and the other two (normal) - at the beginning of 2022, i. E. Perhaps the problem is not present in the new batches. If suddenly you are not lucky, you can take it to the store or replace the bearings with 693ZZ / 693RZ.
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