Specifications

ROG Crosshair IV Formula 3-33
CPU Q-Fan Function [Disabled]
Allows you to enable or disable the CPU fan controller.
[Disabled] Disables the CPU Q-fan controller.
[Enabled] Enables the CPU Q-fan controller.
The following items appear only when you set CPU Q-Fan Function to
[Enabled].
CPU Fan Speed Low Limit [200 RPM]
A warning message will appear to remind you that the CPU fan speed is lower than
the selected value.
Conguration options: [500RPM] [400RPM] [300RPM] [200RPM] [100RPM]
[Ignored]
Select Fan Type: [PWM Fan]
[PWM Fan] Sets to [PWM Fan] when using a 4-pin CPU fan.
[DC Fan] Sets to [DC Fan] when using a 3-pin CPU fan.
Crosshair IV Formula BIOS Setup
Power
Fan Speed Control
CPU Q-Fan Function [Disabled]
Chassis Q-Fan Function [Disabled]
Power Fan Control [Disabled]
OPT Fan 1 Control [Disabled] [Disabled]
OPT Fan 2 Control [Disabled]
OPT Fan 3 Control [Disabled]
Disable/Enable
Q-Fan functions of
CPU fan
OPT TEMP 1/2/3 Overheat Protection [90ºC]
Allows you to set the temperature over which the system automatically shuts
down when any of the thermal sensor cables connected to the motherboard
detects device overheat to protect the device from damage.
Conguration options: [Disabled] [70ºC] [80ºC] [90ºC] [100ºC]
Fan Speed Monitor
CPU Fan; Power Fan; Chassis Fan 1/2/3; OPT Fan 1/2/3 Speed [xxxxRPM]
or [Ignored] / [N/A]
The onboard hardware monitor automatically detects and displays the CPU
fan, chassis fan, power fan, and optional fan speed in rotations per minute
(RPM). If any of the fans is not connected to the motherboard, the eld shows
[N/A]. These items are not user-congurable.
Fan Speed Control