Finally upgraded my PC but now I have the notorious case fan problem.

VaroOP · Mar 10, 2018

First of all, while upgrading my PC I got a lot of help from you guys concerning my CPU cooler and PC Chassis. Thanks a lot for that!
I made a mistake though, I should have consulted you guys about the fans as well.
PC Chassis : Corsair Graphite Series 760T Link : https://www.corsair.com/us/en/Categories/Products/Cases/Graphite-Series%E2%84%A2-760T-Full-Tower-Windowed-Case/p/CC-9011073-WW

Motherboard used : Asus Prime Z270-A Link : https://www.asus.com/Motherboards/PRIME-Z270-A/

Junk fans that I have. ( Realized all too late.) Cooler Master Sickle Flow X 120mm Blue LED
Link : http://www.coolermaster.com/cooling/case-fan/sickleflow-x-blue-led/

Now I have installed 3 of them on top and one of them at the bottom of the case.
I can't,for the life of me figure out how to control their speed!
They don't switch off when I put the computer into sleep mode either.
They just keep running at full speed regardless of what I am doing with the computer.
After some simple google searching I have come to the conclusion that a fan controller would be the best solution. Nah, the best solution would be to change these fans but I am broke. :'(

Please recommend the best fan controller for my PC.
Thank you.

Endless8 · Mar 10, 2018

Hi,
If I'm not wrong you have fan headers in the case for controlling fans, also your motherboard support fans controlling (PWM/DC) so very likely fan control should be somewhere in the bios setting (usually there are profiles)
For fan controllers I found this, may be helpfull https://wirevibes.com/best-fan-controllers/

Paperdoc · Mar 11, 2018

Yes, this can be done easily. You'll need two SPLITTERS - details later.

First the factors that set your limits. You have four Cooler Master SickleFlow X fans to connect. Each is a 3-pin type with max current use of 0.35A. Your mobo has three CHA_FAN headers, of which two are "normal" ones with a limit of 1.0 A max current to their fans each, and one is a high-power header that can supply up to 3.0 A. However, the manual recommends not using 3-pin fans on that last header. The mobo website says that all the CHA_FAN headers automatically adjust themselves to either 3- or 4-pin fans.

With 3-pin fans you can NOT use a HUB to connect two or more to one mobo header; you must use a Splitter. Here's the difference. A SPLITTER has one input - a female connector that plugs into a mobo male fan header. Then it has 2 or 3 outputs - male connectors that you plug your fans into. It has NO other arms. A Hub, on the other hand, has one additional arm that must plug into an output connector from the PSU to provide the higher power needed by multiple fans. But a Hub cannot be used with 3-pin fans - it can only control 4-pin fans.

You should buy two SPITTERS, something like this

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423168&cm_re=coboc_fan_splitter-_-12-423-168-_-Product

That's a 3-pin Splitter, but a 4-pin type also will work just fine for you. With each of these, connect two of your fans to it and then plug that into one of your CHA_FAN1 or CHA_FAN2 headers on the mobo. For both of those headers, go into BIOS Setup and check the configuration. IF there's a choice, set it to use DC Mode. Set it for Standard profile to use automatic control. IF there is a choice of what temperature sensor to use for this, select the common sensor built into the mobo; do not use the sensor inside the CPU chip. Remember to SAVE and EXIT. This will provide power and speed control of all four of those fans, automatically adjusting their speeds according to actual temperature measured inside the case. You will be able to see the speed of ONE of the two fans connected to each CHA_FAN header, but the other of each pair will be ignored.

VaroOP · Mar 14, 2018

Paperdoc :

Yes, this can be done easily. You'll need two SPLITTERS - details later.

First the factors that set your limits. You have four Cooler Master SickleFlow X fans to connect. Each is a 3-pin type with max current use of 0.35A. Your mobo has three CHA_FAN headers, of which two are "normal" ones with a limit of 1.0 A max current to their fans each, and one is a high-power header that can supply up to 3.0 A. However, the manual recommends not using 3-pin fans on that last header. The mobo website says that all the CHA_FAN headers automatically adjust themselves to either 3- or 4-pin fans.

With 3-pin fans you can NOT use a HUB to connect two or more to one mobo header; you must use a Splitter. Here's the difference. A SPLITTER has one input - a female connector that plugs into a mobo male fan header. Then it has 2 or 3 outputs - male connectors that you plug your fans into. It has NO other arms. A Hub, on the other hand, has one additional arm that must plug into an output connector from the PSU to provide the higher power needed by multiple fans. But a Hub cannot be used with 3-pin fans - it can only control 4-pin fans.

You should buy two SPITTERS, something like this

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423168&cm_re=coboc_fan_splitter-_-12-423-168-_-Product

That's a 3-pin Splitter, but a 4-pin type also will work just fine for you. With each of these, connect two of your fans to it and then plug that into one of your CHA_FAN1 or CHA_FAN2 headers on the mobo. For both of those headers, go into BIOS Setup and check the configuration. IF there's a choice, set it to use DC Mode. Set it for Standard profile to use automatic control. IF there is a choice of what temperature sensor to use for this, select the common sensor built into the mobo; do not use the sensor inside the CPU chip. Remember to SAVE and EXIT. This will provide power and speed control of all four of those fans, automatically adjusting their speeds according to actual temperature measured inside the case. You will be able to see the speed of ONE of the two fans connected to each CHA_FAN header, but the other of each pair will be ignored.

Thank you very much for your awesome reply. I think your solution is the best but here's what I did :
I connected the two fans in the front and the rear fan which came with the case directly to my mobo.
Then the extra fans that I bought were connected to the fan speed controller of the PC case and that's it.
I am satisfied with this but I will most definitely do what you have suggested when I get newer and better fans.
Thanks again!

Paperdoc · Mar 15, 2018

You're welcome, and thanks for Best Solution.

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