Upgrade a Simple 2-Wire Case Fan to a 3-Wire Controlled-RPM Fan

By Jason Fitzpatrick on January 11th, 2012

3-wire fans with a built in RPM monitor aren’t so cost prohibitive that you need to upgrade your 2-wire fans to save money, but this is a really fun beginner project that lets you peek inside your computer.

Over at Hard-H20, a modding and hardware wiki, they share a well documented tutorial for taking a 2-wire fan (which is just power + ground) and upgrading it to a 3-wire fan (power + ground + tachometer). By following along with the tutorial you’ll be able to take a simple 2-wire fan and upgrade it to a 3-wire fan capable of being speed-controlled by the motherboard. In the process you’ll get to take apart a fan and learn a little about how your computer and the cooling system works.

Installing Cable Meter on Case Fan [via HackedGadgets]

Jason Fitzpatrick is a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). You can follow him on if you'd like.

  • Published 01/11/12
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