Just a side note:
Some people will get mixed up on the airflow on a HSF.
When you see the fan face, it's usually the intake side, so air is going to pass through it, and you should feel air coming out on the other side of the HS.
Sometimes when I see an actual pic of their rig (when they are having temp problems) I can tell they have the airflow orientation backwards, or just wrong.
It's not usually practical, but if people are not sure how the air travels through the HS, they should try to figure out how to plug it in a power source, without it installed on the MB. For me, I have an external power source that I use to test fans, which was for internal HD that are hooked up externally to a USB port.
Or if they understand a PSU well enough to do the paper clip trick to test any/all fan(s) that way.