I have a Hyper 212+ and I am debating which way to install the heatsink. I have 2 140mm's on top and a 120mm on back. I also have 120 in front and a 120 on the bottom next to my PSU. One of my 140's were supposed to be on my side panel but it makes a humming sound when on my side panel. If it helps I have a NZXT Phantom 410 Mid Tower. If my fan orientation is bad please leave sugggestions below. Thanks!!! 
