Overclock.net › Forums › Cooling › Other Cooling Discussions › Fan control via 4 pin molex connector
New Posts  All Forums:Forum Nav:

Fan control via 4 pin molex connector

post #1 of 4
Thread Starter 
Hi guys,

I recently built an external radbox housing an rs240 and rs360 radiator. I have them in a push-pull configuration with the fans being powered from a 4-pin molex extension plugged into my computer. Since they aren't running off any sort of fan controller, they run full-speed all the time. I can't hear them over an ac unit or window fan but they are loud enough when the room is quiet. My temps are good enough that I hardly even need the fans running unless I'm playing games or something like that. I would like to be able to control the speed of the fans. I don't really need a fan controller, as I have no need to control the fan speeds independently. What I would like to do is put something like a potentiometer in series on the 12 volt wire of the molex connector. I was wondering if there were any downsides to doing this and if there was any way to damage the fans by running them on too low of a voltage. I just want to control the speed of all the fans simultaneously, and this seems like the easiest/cheapest way to do it in my case.

Any input is appreciated!
post #2 of 4
That will work just fine.
Sidewinder Computer[=http://www.sidewindercomputers.com/sirh25wa.html][/]
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
post #3 of 4
Thread Starter 
Thanks! The link took me to the homepage but I was able to find what you were referring to anyway.
post #4 of 4
I''ve run a WCing set up with a rheostat on Some delta 200 CFM fans. Works well.
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Other Cooling Discussions
Overclock.net › Forums › Cooling › Other Cooling Discussions › Fan control via 4 pin molex connector