Controlling molex output? in Case Modding and Other Mods Posted May 7 20 hours ago, LIGISTX said: If they don't have an RPM sense line (they only have molex plugs), not really. What you can do is: https://www.overclockers.com/forums/showthread.php/372297-Guide-to-the-7v-Fan-Mod That guide has you change the fan side wires, so you actually give the fans 7v or 5v instead of 12. So you don't get fan control, but you just run them at a lower voltage and thus lower RPM at all times. Thanks, i was thinking about something similar when asking this question. Il try that when i have time.