Query about the Fractal Nexus fan hub for the Fractal Define 7 case

[Selmancer]

Hi all,

I bought a Define 7 recently and according to the instructions the fan hub should be connected to the CPU_FAN or SYS_FAN header so that the case fan speeds can be controlled from bios.
My Asus motherboard does not have SYS_FAN headers only CHA_FANs which I assume are the same thing.

The cpu is currently cooled with an air cooler (Noctua NH-U12S) with the cooler fan connected to the CPU_FAN header.

I've connected the 3 stock case fans that came with the case (2 front, 1 rear, all 3-pin fans) to the hub. The hub itself is powered via PSU.

It seems the fan hub does not send/receive data to the motherboard when I plug it into any CHA_FAN.
The case fans spin at what I assume to be full speed and fan speed data don't show up in the bios at all.

Is this normal or is there a potential issue with the motherboard?

Or is this fan hub is more designed for a water cooling build where you need multiple fans to cool the radiator for the cpu waterblock?

 

[OZONE]

Hi all,

I bought a Define 7 recently and according to the instructions the fan hub should be connected to the CPU_FAN or SYS_FAN header so that the case fan speeds can be controlled from bios.
My Asus motherboard does not have SYS_FAN headers only CHA_FANs which I assume are the same thing.

The cpu is currently cooled with an air cooler (Noctua NH-U12S) with the cooler fan connected to the CPU_FAN header.

I've connected the 3 stock case fans that came with the case (2 front, 1 rear, all 3-pin fans) to the hub. The hub itself is powered via PSU.

It seems the fan hub does not send/receive data to the motherboard when I plug it into any CHA_FAN.
The case fans spin at what I assume to be full speed and fan speed data don't show up in the bios at all.

Is this normal or is there a potential issue with the motherboard?

Or is this fan hub is more designed for a water cooling build where you need multiple fans to cool the radiator for the cpu waterblock?

I have a Fractal R6 and an Asus X470-F Strix MOBO.

Have 3 case fans connected to the fan hub, and 1 lead going to a motherboard fan socket.

I can control the speeds via the BIOS, which I've set to ramp up based on motherboard temps.

 

[Selmancer]

Mmm.
Assuming your motherboard fan socket you have the lead connected to is a CHA_FAN header, this implies that it's my specific Asus motherboard that doesn't like reading the data from the hub. I have a 4 year old Maximus Gene VIII Mobo, perhaps only newer Asus mobos can use this hub.

 

[OZONE]

Mmm.
Assuming your motherboard fan socket you have the lead connected to is a CHA_FAN header, this implies that it's my specific Asus motherboard that doesn't like reading the data from the hub. I have a 4 year old Maximus Gene VIII Mobo, perhaps only newer Asus mobos can use this hub.

Do you have PWM fans

 

[Selmancer]

The stock fans that come with the Fractal case are all 3-pin fans not 4-pin PWMs. At the moment, I don't own any other PWM fans to test the hub and motherboard (though I might get some Arctic P14s to do this since they are quite cheap).

 

[OZONE]

The stock fans that come with the Fractal case are all 3-pin fans not 4-pin PWMs. At the moment, I don't own any other PWM fans to test the hub and motherboard (though I might get some Arctic P14s to do this since they are quite cheap).

That may be the issue then. I have 3x pwm noctua fans. I would recommend setting the fan profile to the motherboard temps if you prefer a quieter system.

 

[kissel]

Check the manual. It seems to be that it is the rightmost of the 3 4-pin connectors that transmit the RPM value to the mobo. If you don't have anything connected there, no data for the mobo to display.

 

[NKLON]

Hi all,

Similar situation here with a slightly different setup:
- Gigabyte z490 vision g motherboard,
- Define 7 case,
- be quiet! Dark Rock slim CPU cooler (Silent Wings 3 120 PWM fan @1,450 rpm)
- no overclocking or gaming.

Just as the OP above, the CPU cooler is connected to the correct (rightmost) 4-pin connector on the Nexus+ 2 hub. The 4-pin cable from the hub is to the CPU_FAN header on the motherboard. The stock case fans (non-PWM) are connected to the corresponding 3-pin connectors on the Nexus hub. BIOS only shows the CPU_FAN information and it is correct (approx 1,450rpm). But what about the case fans? They do not appear anywhere yet they're working properly. They are rated @1,000 rpm but are they really turning at that speed or are they at the speed of the CPU cooler fan? I would like a quieter operation and since I'm not going to overclock or game on this machine, this should be possible without any temperature issues. Is there a way to control their speed or do I have to swap them with PWM fans so that I can set them up on a more silent profile?

I know it's a lot of questions but would welcome your advice before engaging in the extra expense.

Thanks in advance.

 

[Cavallino]

Yes I would like to know this too.