Hi folks, Notes for the UDOO Staff It would be really cool if you could add something similar to the shop as it would massively help people. Version RC8 of the BIOS seems to have PWM support but this is not clearly documented. Is this going to be supported and documented? Is there any details on how this will work? Warning: Let's start with the obvious here. Please follow this guide/post at your own risks. Don't blame me and/or UDOO or anyone else if something goes wrong. This guide includes instruction to disassemble your UDOO and you may void your warranty. Safety notes: Take time to read the entire post before you consider going into this path. When you tighten the screws, leave them loose first to more easily adjust the components. Use a lead connected to the ground to avoid static discharges. Unplug the device before you attempt *anything*. Be aware than any metal parts falling on the motherboard may render the device unsuable. Always operate on a flat surface and that doesn't conduct electricity or static electricity. Warning: Let's state the obvious here again. Please follow this guide/post at your own risks. Don't blame me and/or UDOO or anyone else if something goes wrong. This guide includes instructions to disassemble your UDOO and that may void your warranty. Long story short, I've been a long time backer and supporter of UDOO I bought the first UDOO followed by the UDOOx86 and now a UDOO bolt v8. I like what UDOO does, but I was frustrated with the noisy fan situation when I first powered the device. What follows below is my attempt at helping this community. Components (See references below): 1 Noctua 80mm fan either 5v or 12v (see note below), optionally with PWM. 1 CPU Cooler HB-802, 2 Heatpipes Radiator Aluminum Heatsink for motherboard and northbridge with 80mm fan support 12 to 20 washers. The inner hole should be larger than 2.51mm in diameter and the outer diameter of about 8.3mm. Tools: 1 Philips screwdriver with a magnetic head 1 small pair of small pliers 1 Razor blade or anything that's sharp 1 ground lead CPU Thermal grease (optional but recommended) A bit of isopropyl alcohol 2 or 3 cotton buddy Part I - Preamble You may choose a 5v or 12v fan. The 5v version comes with a USB adapter making it very convenient to power. However, since the fan is fully powered, it will run at full speed. Choosing the 12v fan will require you to have 2 wires to power the fan from the udoo connector. As the fan will be under-powered, it will rotate more slowly than the 5v version. This will make the cooling less efficient but a lot quieter. 5v: Maximum cooling effect, noisier cooling solution 12v: Very quiet cooling solution, reduced cooling efficiency, requires 2 additional wires to power. What about PWM?: I personally opted for the PWM version as I hope the BIOS will be able to drive the PWM via the corresponding pinout. Part II - Disassembling 1 - Unplug your udoo entirely (power, HDMI, network cable, Wi-Fi/BT antennas), the power switch, any external SATA drives and the RAM. 2 - With the philips head screwdriver, unscrew the fan from the radiator. 3 - Then, with the pliers, unscrew the radiator for the board leaving the AMD Rizen CPU apparent 4 - Apply some alcohol on the cotton buddy and gently remove any grease stuck on the CPU At this point, you should have a clean motherboard with a shinny CPU. 5 - From the radiator (not the fan) remove 2 of the 4 screws. You will need to popout the tiny circlips (the white thingy on the photo) that attach the screws to the radiator. Part III - Pre-assembly 6 - With a sharp blade, slightly increase the inner square of the CPU protective pad to match the AMD Rizen CPU (see step 9). IMPORTANT: The inner rectangle must be large enough to not cover any part of the CPU, yet small enough to protect the small resistors around the CPU 7 - Assemble the Heatsink as shown on the manual provided. Make sure you use the arms with a hole at the end, not the hooked ones. 8 - On each screw, stack the washers so it amount to about 2.7 to 3mm. This is done to increase the contact/pressure between the heatsink and the CPU and maximize thermal exchange.