Picture shows technique to supply 7 volts. Fan positive to 12 v as usual, but fan ground goes to 5 volt line. It comes with a front plastic fan holder and metal bracket. This time I drilled out the bracket's rivets and it allowed me to open the case front more. The bottom of the plastic case front is cut out as much as possible to allow air to flow in freely.
Case fan is mounted in back and guard cut from power supply.
The stock fan in this power supply is very quiet and puts out plenty of air. It will stay till it gets noisy, then another NMB will go in. The pattern of holes in back is covered with clear tape, magic marker lines just to photograph better. Front of case cut out with foam cemented to prevent warm case air from recirculating. Foam is cut, stacked, and glued to the shape of the case front.