August 19, 20241 yr I purchased an N5105 motherboard (link here), and only just realized that the case fan speed cannot be controlled as the board only has a 3 pin connection - no PWM support. This is an issue as I'd like to save power, and keep noise low if the system isn't being used as it currently sits in my office. What are my options? Is there a method of modifying the BIOS to get the fan to run at a different speed based off the total system temp (or ideally average disk temp), or should I instead just buy a different motherboard with PWM fan control support? It looks like there are a number of containers that allow PWM fans to be set based on disk temp. If you'd recommend a new board, any pointers to boards that have 6+ sata ports, support for 32GB RAM, and low power? My case is a Jonsbo N4 (supports mini ITX or micro ATX). Thanks!
August 23, 20241 yr 3 pin not means it can't control the fan speed. Speed adjustment was controlling the voltage apply to the fan. If you haven't found any fan adjustment on BIOS then this most likely the 3pin header ( CPU fan ) may not have any control, just always run at full-speed ( low rpm fan ). To confirm this true or not, use a multimeter to measure the voltage across red-black wire, if it always 12v, this mean no control there. Edited August 23, 20241 yr by Vr2Io
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