Under non-gaming duty, the rear/top fans never even fire up, which is a nice feature of the AN8-Ultra motherboard. The Zalman 7700 seams to do a sufficient job of cooling all motherboard components under light duty.
Plan on replacing these with Nexus or similar due to the fact that they won't even spin up on less than 7.5V @ 960RPM. If anyone knows of a good quiet 120MM that runs smoothly on 6V, let me know.

Single 120MM fan cooling hard drive and PSU in bottom chamber. Running at 5V and extremely quiet. This fan was OEM with a Chenming server case. It's made by the same plant that cranks out the beloved Yate Loons. What really appealed to me was that it would start to spin on only 3V from my benchtop power supply! So i snipped off the 4 pin power connector and wired it up for 5V operation with a standard power supply connector. Considering replacing with a Nexus just for the simple fact that I can monitor the speed.

Now the only audible component in the system is the VF700 cooling my video card. Need a good solution to slow this fan down to 5V levels during light duty and still allow higher speeds during gaming.