Fan is about 4000 rpm which is lower than the 8,000 rpm ball bearing fans I purchased earlier, which were incredibly noisy.This looks to be an exact replacement of the OEM part and is almost silent in operation which is exactly what I wanted. It moves a low volume of air but that’s what i needed for a low heat generation device. I am concerned about the lifespan relative to the ball bearing motors, only time will tell on overall lifespan.So far very happy with this product.
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