For those trying to compare the Yates to the FN121 on a radiator...the FN121 does have slightly higher CFM loss on a radiator but is still competitive and very quiet (though if you look, it is not on my "Radiator Favorites" graph--just didn't make the cut).

<120mm fans will not be tested. I did try some 140mm fans but either my testbed was deterring them significantly (was using 120mm holes with adapters) or they do not perform well. Testbed in Round 3 will hopefully be 140mm friendly