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Chassis Q-Fan Control

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D0M1N13

Junior Member
Hi everybody,

I just build a new rig. The motherboard I chose was the Asus P9X79 Deluxe and I was digging in the UEFI/BIOS and came across Chassis Q-Fan Control option. Now.. there is also a CPU Q-Fan Control and I know what does that do - it regulates the Fan of the CPU. I had mine disabled because I have a Hydro Series Pump from Corsair. Now with the Chassis Q-Fan Control I know it controls the fan/fans of the case... but there are questions that I have:

1. When I would select enabled does this control all the fans on my case ? Some fans ?
2. What does the Chassis 1 Q-Fan Control and Chassis 2 Q-Fan control mean ? What fans does it control ?
3. I have a CoolerMaster Cosmos II case... and I have a controller on the front of my case... now.. if I enable the Chassis Q-Fan Control does this override my front controller ?

I just need help with this
frown.gif
Please help !!
 
It would only control fans connected to the headers on the motherboard. Your case fans are connected to the motherboard headers? 4 pin molex from power supply? If the headers then it would somewhat mess with the controller setting.
 
I have the pro version of the same motherboard. Nice choice. 🙂

Having the fan speed controlled by the motherboard requires PWM fans with the 4 pin header connection. These can plug directly into motherboard for power. It's important to note that this is different than a 4 pin molex connector, which is used to power a fan from the psu.

I may be wrong, but I think the settings you're referring to in the bios either set a fan profile or set minimum fan speed which is used in the AI suite.
 
On my P8Z77-V Pro, Q-Fan can control 3-pin and 4-pin PWM fans on all chassis fan headers. You have to use a 4-pin PWM fan for the CPU fan(s) only; if you use 3-pin on the CPU headers, they'll run at 100% all the time.

To answer the last part of OP's question, if your fans are plugged into a hardware fan controller, Q-Fan will have no effect. They have to be plugged directly into the motherboard.
 
birthdaymonkey said:
On my P8Z77-V Pro, Q-Fan can control 3-pin and 4-pin PWM fans on all chassis fan headers. You have to use a 4-pin PWM fan for the CPU fan(s) only; if you use 3-pin on the CPU headers, they'll run at 100% all the time.
Click to expand...
Gorrram it, no wonder. I thought my P8Z77-M was defective.
 
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