My Netgear gigabit switch didn’t come with a fan, (“Silent operation!”) then requested to be kept in moving air. Jerks. I bought a 120mm from Vertex, and just now got around to setting it up. Zombie 3 gave up its CD drive so that the molex could reach outside the case.
I was reminded of my hasty job crimping the server cable when it went down with seemingly any nudge. -_-
I initially pointed it the wrong way because I didn’t bother to check the arrows, but the end result is a 120mm case fan taped to the top of the case adjacent to the switch with a partial boxboard air duct.