Question MSI Z790 ACE Motherboard, 6 fan headers - 6 fan system, advice please.

[NuggetsPC]

Hi,

I have an MSI z790 ACE motherboard with 5 system fan headers on the board, each max 2A/24W (SYS_FAN 1 - 5) and one CPU fan header (CPU_FAN1) max 3A/36W.

The board also has a two pump headers (PUMP_FAN 1 - 2), 3A/36W each, one of which will be taken up with the system pump.

SYS_FAN1-5 are all "DC mode" and CPU_FAN1 and PUMP_FAN1-2 are a choice of "DC" or "PWM"

DC mode controls fan speed by varying voltage
PWM uses the speed control signal.

I'm building a water-cooled system with 6 fans (3 case, 3 radiator), I want to use the smart fan mode in the bios to control the fans using the CPU and external temperature inputs (T_SEN1 & 2)

What are peoples suggestions for the best wiring/connecting fans for a system with best control for fan speed so it is a reasonably quiet system when carrying out low demand tasks?

Cheers

 

[sajid_ali]

When building a water-cooled system with multiple fans, it is important to have proper control over the fan speed in order to maintain a quiet system during low demand tasks. Here are a few suggestions for wiring and connecting the fans to your MSI Z790 ACE motherboard:

1. Connect the radiator fans to the SYS_FAN headers: The radiator fans are responsible for removing heat from the water-cooling system, so it makes sense to connect them to the headers that are specifically designated for system fans. This will allow you to use the smart fan mode in the BIOS to control the speed of the radiator fans based on the CPU and external temperature inputs.
2. Connect the case fans to the SYS_FAN headers as well: Connecting the case fans to the SYS_FAN headers will also allow you to control their speed using the smart fan mode in the BIOS. This will help to keep the overall noise level of the system down during low demand tasks.
3. Connect the pump to the PUMP_FAN headers: The pump is an important component of the water-cooling system and it's best to connect it to a header that is specifically designated for pumps. This will ensure that the pump is getting enough power and will help to prevent overheating.
4. Connect the CPU_FAN header to the CPU cooler's fan: Connecting the CPU cooler's fan to the CPU_FAN header will allow you to control the speed of the fan based on the CPU temperature. This is important for maintaining proper cooling of the CPU and preventing overheating.
5. Use PWM mode for all fans: PWM mode uses a speed control signal to control the fan speed, it allows the fans to run at low speeds and more precisely adjust the fan speed, which results in a more quiet system during low demand tasks.

It's worth noting that all of this troubleshooting steps are suggestions and not a guarantee that it will solve the problem. If you have any doubts, it may be best to contact the manufacturer for further assistance.