I looked in the manual, and searched the forums here, but could not find the maximum allowable power for the fan connector. This bit of information should be added to the manual, given the wide possible variety of cooling solutions people might choose to use for the UDOOx86. I am currently using a quiet 120mm fan that draws around 2 to 3 watts, or up to about 0.3 amps. It is working fine, and can easily keep up with Furmark + CPUburn when running at 50% speed as set in BIOS. As expected, it starts at 100% while BIOS is still in control, and leaving it running for a long time while exploring the BIOS settings did not burn anything out. I salvaged the tiny fan connector from a dead laptop CPU blower/fan, and I am guessing this is the standard connector used for most 3 pin laptop fans, albeit with a different pin-out as inferred by the wire colors (which I swapped around to match the UDOO because I'm fussy). In case anyone is wondering why such a large fan, it was simple: it was the quietest fan I had on hand, and I was looking for effective silence for my mother's TV computer. The UDOO lives in a decorative bamboo slatted box that is about 11" long, 8" wide, and 5" tall. The box actually has a wire frame made of steel wire about like typical coat hanger wire, with 1/2" bamboo slats bound to the wire to cover the box, with about 1/4" air gaps in between. We mounted the fan inside the box with small tie wraps around the slats, with the fan on the inside of the hinged lid, where it opens out of the way with the lid for access. The fan blows down on the UDOO, with the heat sink sitting under one side of the blades to avoid the dead zone in the middle of the fan. There are no extra air holes, but the fan sucks plenty of air through the slats, and air blows out all around the sides. The UDOO, an SSD and the stock 12V power supply all just sit on the bamboo bottom of the box, with cables for HDMI, LAN and a 120v extension cord leaving the box through a handle-hole at one end, and a power+reset button on a small plastic panel (salvaged from an old case) tie-wrapped into the handle hole at the other end. We are delighted, and the UDOO is running perfectly on Win7.