These are great fans within that compromised price between the $8 fans ...
Brian Fuller, Amazon
10 January 2015
Summary: These are great fans within that compromised price between the $8 fans not worth buying and the $23 Noctuas that can get expensive when you need 2-4 for a full pc case. The black and white one work well in almost any color scheme and they are really quiet.
Summary: These fans are 'really' silent and reliable. I have installed them in multiple computers and use them for the computer case and the CPU heatsink cooler. It is easy to see why "[...] uses them as the baseline reference for comparison with all computer fans.
Summary: i can only hear the fan if my head is less than 1 foot away from the fan. it doesnt move tons of air, but it moves enough for what i need. if i needed more silent fans, i'd gladly get these again. edit: wasn't sure how to use the anti vibration mounts, here's what i did. i think you are supposed to use them instead of screws. so i use screws in opposite corners. in the other corners i shoved the rubber point thing through.
Summary: This fan pushes a lot of air and is nearly silent. I can hear my GPU fan over my case fans (these units). A very nice quality fan to replace your fans. Comes with rubber mounts as well for vibration. Very happy. Have had them over a year.