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Asus F2A55 2.6.4CHA_FAN1/2 Q-FanControl [Disabled], 2.6.5CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage, 2.6.6Anti Surge Support [Enabled]

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2.6.4CHA_FAN1/2 Q-Fan Control [Disabled]

[Disabled]	Disables the Chassis Q-Fan1/2 control feature.
[Enabled]	Enables the Chassis Q-Fan1/2 control feature.

CHA_FAN1/2 Fan Speed Low Limit [600 RPM]

This item appears only when you enable the CHA_FAN1/2 Q-Fan Control feature and allows you to disable or set the chassis fan warning speed. Configuration options: [Ignore] [200RPM] [300 RPM] [400 RPM] [500 RPM] [600 RPM]

CHA_FAN1/2 Fan Profile [Standard]

This item appears only when you enable the CHA_FAN1/2 Q-Fan Control feature and allows you to set the appropriate performance level of the chassis fan.

[Standard]	Sets to [Standard] to make the chassis fan automatically adjust depending
	on the chassis temperature.
[Silent]	Sets to [Silent] to minimize the fan speed for quiet chassis fan operation.
[Turbo]	Sets to [Turbo] to achieve maximum chassis fan speed.
[Manual]	Sets to [Manual] to assign detailed fan speed control parameters.

The following four items appear only when you set CHA_FAN1/2 Fan Profile to [Manual].

CHA_FAN1/2 Upper Temperature [70]

Use the <+> and <-> keys to adjust the upper limit of the CPU temperature. The values range from 40ºC to 75ºC.

CHA_FAN1/2 Fan Max. Duty Cycle(%) [100]

Use the <+> and <-> keys to adjust the maximum chassis fan duty cycle. The values range from 60% to 100%. When the chassis temperature reaches the upper limit, the chassis fan will operate at the maximum duty cycle.

CHA_FAN1/2 Lower Temperature [20]

Displays the lower limit of the chassis temperature.

CHA_FAN1/2 Fan Min. Duty Cycle(%) [40]

Use the <+> and <-> keys to adjust the minimum chassis fan duty cycle. The values range from 40% to 100%. When the chassis temperature is under 40ºC, the chassis fan will operate at the minimum duty cycle.

2.6.5CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage

The onboard hardware monitor automatically detects the voltage output through the onboard voltage regulators. Select Ignore if you do not want to detect this item.

2.6.6Anti Surge Support [Enabled]

This item allows you to enable or disable the Anti Surge function. Configuration options: [Disabled] [Enabled]

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Contents

Page Page Contents Page Page Electrical safety Operation safety How this guide is organized Where to find more information Conventions used in this guide Typography F2A55 specifications summary Page Page Package contents 1.1.1Product highlights 1.1.2ASUS DIGI+ VRM 1.1.3ASUS Exclusive Features Page 1.2Before you proceed 1.3.1Placement direction 1.3.2Screw holes 1.3.3Motherboard layout 1.3.4Layout contents 1.4.1APU installation 1.4.2APU heatsink and fan assembly installation Page 1.5.1Overview 1.5.2Memory configurations Page Page Page Page Page Page 1.5.3Installing a DIMM 1.6.1Installing an expansion card 1.6.2Configuring an expansion card 1.6.3PCI slots 1.6.4PCI Express x1 slots 1.6.5PCI Express x16 slots Page 1.7Jumpers 1.8.1Rear panel ports Page 1.8.2Internal connectors Page Page Page Page Page 1.9Onboard switch 1.10Onboard LEDs 1.11.1Installing an operating system 1.11.2Support DVD information Page 2.1.1ASUS Update utility 2.1.2ASUS EZ Flash 2.1.3ASUS CrashFree BIOS 3 utility 2.1.4ASUS BIOS Updater Page BIOS menu screen Page Page Page 2.3.1System Language [English] 2.3.2System Date [Day xx/xx/xxxx] 2.3.3System Time [xx:xx:xx] 2.3.4Security Page 2.4Ai Tweaker menu 2.4.1Ai Overclock Tuner [Auto] 2.4.2Memory Frequency [Auto] 2.4.3APU Multiplier [Auto] 2.4.4NB Frequency [Auto] 2.4.5EPU Power Saving Mode [Disabled] 2.4.6OC Tuner 2.4.7DRAM Timing Control 2.4.8CPU Voltage [Offset Mode] 2.4.9DRAM Voltage [Auto] 2.4.10SB 1.1V Voltage [Auto] 2.4.12APU1.2V Voltage [Auto] 2.4.13VDDA Voltage [Auto] 2.4.14DIGI+ VRM Page 2.5.1CPU Configuration 2.5.2SATA Configuration 2.5.3USB Configuration 2.5.4NB Configuration 2.5.5Onboard Devices Configuration 2.5.6APM 2.5.7Network Stack 2.6Monitor menu 2.6.1CPU Temperature / MB Temperature [xxxºC/xxxºF] 2.6.2CPU_FAN / CHA_FAN Speed [xxxx RPM] or [Ignore] / [N/A] 2.6.3CPU_FAN Q-FanControl [Enabled] 2.6.4CHA_FAN1/2 Q-FanControl [Disabled] 2.6.5CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage 2.6.6Anti Surge Support [Enabled] 2.7.1Bootup NumLock State [On] 2.7.2Full Screen Logo [Enabled] 2.7.3Fast Boot [Enabled] 2.7.4Post Delay Time [3 sec] 2.7.5Wait for ‘F1’ If Error [Enabled] 2.7.6Option ROM Messages [Force BIOS] 2.7.7Next boot after AC Power Loss [Normal Boot] 2.7.8CSM Parameters 2.7.9Security Boot parameters Page 2.7.10Setup Mode [EZ Mode] 2.7.11Boot Option Priorities 2.7.12Boot Override 2.8.1ASUS EZ Flash 2 Utility 2.8.2ASUS SPD Information 2.8.3ASUS O.C. Profile 2.9Exit menu Page Federal Communications Commission Statement IC: Canadian Compliance Statement Canadian Department of Communications Statement VCCI: Japan Compliance Statement VCCI Class B Statement KC: Korea Warning Statement REACH ASUSTeK COMPUTER INC ASUS COMPUTER INTERNATIONAL (America) ASUS COMPUTER GmbH (Germany and Austria)