Question Fan hub is not controlling speed anymore ?

[jimraynor]

Hi!
I bought an Id-cooling FH-07 fan hub, and for the first few days it worked perfectly. Yesterday my PC crashed (I was using CEMU and it stopped working, apparently a common issue) and after resetting, the fans are stuck at 100% all the time, extremely noisy.
Fans are 3x Id-cooling Tf-12025 plus the one that came with the case (a 3-pin fan). Motherboard is Gigabyte B450M DS3H V2.
What should I do?
Thanks!!

 

[Aeacus]

Go to BIOS and make sure that the fan header where your fan hub is connected, isn't reverted back to DC mode. It has to be in PWM mode, for the fan hub to operate properly. If the fan header is in DC mode, fan hub will run all connected fans at 100% and fan speed control is impossible.

 

[jimraynor]

Go to BIOS and make sure that the fan header where your fan hub is connected, isn't reverted back to DC mode. It has to be in PWM mode, for the fan hub to operate properly. If the fan header is in DC mode, fan hub will run all connected fans at 100% and fan speed control is impossible.

Thanks! I checked, and it didn't change, it is in PWM mode, as it always was

 

[Aeacus]

Check the cable connections as well.

Other than that, it's cheap and simple device. If it doesn't work anymore (e.g poor reliability due to cheap price), just replace it.

 

[Paperdoc]

In that same fan header screen, check that it is set to use the "Normal" Fan Speed Control Profile. ALSO check the connection of the cable from that header to the Hub. If it has a poor connection on Pin 3 or 4 it may do this. And check both ends of that cable.

 

[jimraynor]

In that same fan header screen, check that it is set to use the "Normal" Fan Speed Control Profile. ALSO check the connection of the cable from that header to the Hub. If it has a poor connection on Pin 3 or 4 it may do this. And check both ends of that cable.

Hi! It's in "normal" (though I also tried "silent", with no luck), and the connection seems fine.
The weird thing is, I then tried connecting the hub to the CPU fan header (instead of sys_fan), and there it's working fine. The problem is that is not very practical, because the reference value is the cpu fan, so every time it needs to speed up the cpu fan, every fan starts working hard (and noisily)

 

[Paperdoc]

A couple more ideas.

1. Verify that ALL the fans on that hub are running full speed. You have one 3-pin fan among them, The 3-pin fan WILL run full speed always - its speed cannot be controlled by the PWM signal from the Hub and header. If ONLY that 3-pin fan is full speed, then that is normal.

2. Although I agree having your case fans controlled by the CPU_FAN header is not ideal, it is OK when you don't have a choice. The overall system load is pretty well correlated with the CPU workload, so that fan control strategy is reasonable if not ideal.

 

[jimraynor]

A couple more ideas.

1. Verify that ALL the fans on that hub are running full speed. You have one 3-pin fan among them, The 3-pin fan WILL run full speed always - its speed cannot be controlled by the PWM signal from the Hub and header. If ONLY that 3-pin fan is full speed, then that is normal.

2. Although I agree having your case fans controlled by the CPU_FAN header is not ideal, it is OK when you don't have a choice. The overall system load is pretty well correlated with the CPU workload, so that fan control strategy is reasonable if not ideal.

Thanks for the additional tips!

1. Yep, all fans are running full speed. In fact, I even unplugged the 3-pin fan, to remove one factor, and the others are still behaving the same way.

2. You are right, leaving it at that might be OK, but the thing is, the extra (unnecessary) noise bothers me, considering I specifically bought those fans because they were supposed to be silent. And besides, my curiosity gets the better of me, I would really want to crack the mystery.

Thanks again for your time and help!

 

[Aeacus]

considering I specifically bought those fans because they were supposed to be silent

Specs say;
700-1800 RPM
max 76.16 CFM <- Suspiciously high CFM value here.
15.2-35.2 dB(A)
2.16 mmH2O <- I believe it to be false, since that fan blade design can't reach such high static pressure.
link: https://www.idcooling.com/Product/detail/id/237/name/TF-12025-BLACK

So, at best, on 700 RPM (min speed), it produces 15.2 dB(A), which while quiet, isn't one of the top performance ones.

For actual silent fan, look towards Noctua NF-A12x25 LS-PWM, who's specs are:
450-1200 RPM
23.19 CFM at 900 RPM, 32.78 CFM at 1200 RPM
7.6 dB(A) at 900 RPM, 12.1 dB(A) at 1200 RPM
0.41 mmH20 at 900 RPM, 0.82 mmH2O at 1200 RPM
specs: https://noctua.at/en/products/fan/nf-a12x25-ls-pwm/specification

Noctua fan, is both more quiet at higher RPM and it's airflow values are also realistic. Moreover, even at full tilt, it still is quieter than your ID cooling fan at it's lowest speed.
So, if you want quiet, get Noctua. Btw, that Noctua fan is also PWM. And when using LNA adapter, you can cap the Noctua fan at 900 RPM, with mere 7.6 dB(A).

 

[jimraynor]

Specs say;
700-1800 RPM
max 76.16 CFM <- Suspiciously high CFM value here.
15.2-35.2 dB(A)
2.16 mmH2O <- I believe it to be false, since that fan blade design can't reach such high static pressure.
link: https://www.idcooling.com/Product/detail/id/237/name/TF-12025-BLACK

So, at best, on 700 RPM (min speed), it produces 15.2 dB(A), which while quiet, isn't one of the top performance ones.

For actual silent fan, look towards Noctua NF-A12x25 LS-PWM, who's specs are:
450-1200 RPM
23.19 CFM at 900 RPM, 32.78 CFM at 1200 RPM
7.6 dB(A) at 900 RPM, 12.1 dB(A) at 1200 RPM
0.41 mmH20 at 900 RPM, 0.82 mmH2O at 1200 RPM
specs: https://noctua.at/en/products/fan/nf-a12x25-ls-pwm/specification

Noctua fan, is both more quiet at higher RPM and it's airflow values are also realistic. Moreover, even at full tilt, it still is quieter than your ID cooling fan at it's lowest speed.
So, if you want quiet, get Noctua. Btw, that Noctua fan is also PWM. And when using LNA adapter, you can cap the Noctua fan at 900 RPM, with mere 7.6 dB(A).

I understand you are trying to help, but you are missing the point. Everything worked fine until all of a sudden it didn't. I'm hoping to identify the issue and fix it, not replace stuff that I bought not even a month ago

 

[Aeacus]

I'm hoping to identify the issue and fix it, not replace stuff that I bought not even a month ago

Cheap hardware = poor reliability = it dies fast. No way to "fix" hardware failure. Also, all possible fixes have been suggested and none helped.

So, you're left with either accepting the 100% fan speeds; OR buying new PWM hub. Maybe RMA it if it has warranty.

Personally, i'd go with good quality fan hub. E.g Phanteks one,
specs: https://www.phanteks.com/PH-PWHUB_02.html

Sure, it may cost more, but it will also last longer.