ThermalTake Case Fan not listening to BIOS commands.

[MART3R]

Alright heres the problem: I installed a new LED case fan from ThermalTake and Its constantly running at full speed, causing my air pressure to be screwy and its very loud.

It has 2 connectors coming out of it, one molex and one 3-pin. Ive tryed to with just the 3-pin but it didnt even turn on so now Ive got the molex connected to the PSU and the 3-pin connected to the motherboard. Problem is: I can see the fan in the BIOS but no matter what I do it always runs full speed. Ive tryed putting it to 'Silent" mode as well as giving it a manual RPM but nothing seems to work.

Is this a common problem and theres a quick life-hack that will fix it? Do I need to get a new case fan?

Not sure if this is the exact model but I found it on google and it looks exactly the same:
Thermaltake 120mm Blue LED Case Cooling Fan CL-F012-PL12BU-A

 

[Dark Lord of Tech]

http://www.tomshardware.com/answers/id-2559018/fan-speed-control-pin-pin-pin.html
Great info here , scroll down.

 

[Paperdoc]

Your statement "now Ive got the molex connected to the PSU and the 3-pin connected to the motherboard" confuses me a lot. The fan website pictures indicate that this is a 3-pin fan with a "normal" 3-pin fan female connector on the end of its cable, plus it is also supplied with an adapter cable that has a female 4-pin Molex on one end and a 3-pin male fan connector (missing Pin #3) on the other. That adapter is for use if you can NOT connect the fan to a mobo header. Using the adapter cable allows you to connect the fan to a fixed 12 VDC supply from a PSU Molex female output. It connects Ground and +12 VDC to fan pins 1 and 2. So I do not understand how you could connect the fan to both a mobo header and a Molex PSU output when the fan itself has only one connector. Whatever you've done, you should NOT connect the fan to BOTH a mobo header and a Molex power source.

Now, any fan connected directly to a PSU output of fixed 12 VDC voltage will always run at full speed. If you connect this fan, which has only 3 pins, to a mobo header that uses 4 pins and truly does use PWM Mode, that header can NOT control the fan's speed, either - it still will only run at full speed. The only way to control the speed of a 3-pin fan is for the header to use Voltage Control Mode.

You have not told us what mobo you have. Post back here what make and exactly what mobo model number you have so we can look up its manual. SOME mobos have fan headers that can be configured for what you need, and some don't. With the specs we can advise what you can do.

 

[MART3R]

Your statement "now Ive got the molex connected to the PSU and the 3-pin connected to the motherboard" confuses me a lot. The fan website pictures indicate that this is a 3-pin fan with a "normal" 3-pin fan female connector on the end of its cable, plus it is also supplied with an adapter cable that has a female 4-pin Molex on one end and a 3-pin male fan connector (missing Pin #3) on the other. That adapter is for use if you can NOT connect the fan to a mobo header. Using the adapter cable allows you to connect the fan to a fixed 12 VDC supply from a PSU Molex female output. It connects Ground and +12 VDC to fan pins 1 and 2. So I do not understand how you could connect the fan to both a mobo header and a Molex PSU output when the fan itself has only one connector. Whatever you've done, you should NOT connect the fan to BOTH a mobo header and a Molex power source.

Now, any fan connected directly to a PSU output of fixed 12 VDC voltage will always run at full speed. If you connect this fan, which has only 3 pins, to a mobo header that uses 4 pins and truly does use PWM Mode, that header can NOT control the fan's speed, either - it still will only run at full speed. The only way to control the speed of a 3-pin fan is for the header to use Voltage Control Mode.

You have not told us what mobo you have. Post back here what make and exactly what mobo model number you have so we can look up its manual. SOME mobos have fan headers that can be configured for what you need, and some don't. With the specs we can advise what you can do.

Ive found the issue.
I had mentioned that I tried turning my computer on with only the 3-pin connected, but the fan didnt light up or spin so thats why I tried connecting the molex to the PSU and the 3-pin to the mobo at the same time. In a desperate attempt to have the PSU power it while the mobo controls it. I know now that having it connected directly to the PSU will make it run at 100% so it would not have worked anyway, but under further inspection (removing the fan completely and checking the wires carefully) it seems that the 3-pin female connector on the fan had been damaged. That explains why it didnt turn on with just the 3-pin connected. Also I must have an older version or something, because the fan itself has both molex and 3-pin wires coming out of it.

TL: DR- Turns out the fan itself is broken and can only be powered by molex. Fan is a lost cause and will have to be replaced.

 

[Paperdoc]

ALERT! The issue that can cause you problems STILL is that a mobo fan header that uses PWM control can NOT control the speed of a 3-pin fan. Now, I know that you have chosen a blue LED fan which happens to be of the 3-pin type, and probably want to keep that choice. So again, POST here exactly what mobo you have so we can advise whether or not your mobo can control a 3-pin fan.

If it CAN control the fan, we can advise how to set it up. If the mobo cannot do this, you may need to search for a 4-pin fan style that has the lighting feature you want.

Thanks for Best solution.