Hello,

I recently installed a Thermal-Star Fan Controller/Card reader combo.

The controller can controll 4 fans via a 3 PIN connection, however all of my fans are all molex (only) with two wires (one red + one black) leading to the 4 pin molex head.

No PROBLEM I thought, and I simply bought 4 "4-pin molex to 3-pin" adapters.

Now the fans work connected through the controller, but I cannot control the speed of the fans via the controller. I have tested the controller with a 3 pin fan and it worked flawlessly.

I have read something about molex lacking a tachometer (YELLOW wire?) which is the cause. However, the fans are all molex, and I am not replacing them (they are all high performance LED). The fan controller in question does not have any molex connections, other than to power the LCD, LED's, and Card readers. I need these fans to be controllable. Is there some type of adapter that I can use? Did I get the wrong one? The one I have is formed like a 3 pin, but only has 2 wires, and two pins.

All advice appreciated.
Thanks,
DiatechYour computer won't recognize a case fan if it doesn't have the RPM sensor circuitry.
http://www.overclock.net/air-cooling/933844-panaflo-fan-can-i-convert-2-a.html
You could open up your fan and TAKE a look... Quote from: Diatech on October 04, 2011, 09:59:51 PM

...
1.  all of my fans are all molex (only) with two wires (one red + one black) leading to the 4 pin molex head.
2.  No problem I thought, and I simply bought 4 "4-pin molex to 3-pin" adapters.
...