Asus M4A78 PRO User Manual - Page 65

Chapter 2: BIOS setup

2-21

2.5.4

USB Configuration

The items in this menu allows you to change the USB-related features. Select an item then

press

<Enter>

to display the configuration options.

The

Module Version

and

USB Devices Enabled

items show the auto-detected values. If

no USB device is detected, the item shows

None

.

USB Support [Enable]

Allows you to enable or disable the USB Functions.

Configuration options: [Enabled] [Disabled]

Legacy USB Support [Enabled]

Allows you to enable or disable support for USB devices on legacy operating systems

(OS). Setting to Auto allows the system to detect the presence of USB devices at startup.

If detected, the USB controller legacy mode is enabled. If no USB device is detected, the

legacy USB support is disabled.

Configuration options: [Disabled] [Enabled] [Auto]

USB 2.0 Controller Mode [HiSpeed]

Allows you to configure the USB 2.0 controller in HiSpeed (480 Mbps) or Full Speed (12

Mbps).

Configuration options: [FullSpeed] [HiSpeed]

BIOS EHCI Hand-off [Enabled]

Allows you to enable the support for operating systems without an EHCI hand-off feature.

Configuration options: [Disabled] [Enabled]

2.6

Power menu

The

Power

menu items allow you to change the settings for the Advanced Configuration and

Power Interface (ACPI) and the Advanced Power Management (APM). Select an item then

press

<Enter>

to display the configuration options.

v02.61 (C)Copyright 1985-2008, American Megatrends, Inc.

BIOS SETUP UTILITY

Main

Ai Tweaker

Advanced

Power

Boot

Tools

Exit

Suspend Mode

[Auto]

Repost Video on S3 Resume

[No]

ACPI 2.0 Support

[Disabled]

ACPI APIC support

[Enabled]

APM Configuration

Hardware Monitor

←→

Select Screen

↑↓

Select Item

+-

Change Option

F1

General Help

F10 Save and Exit

ESC Exit

Select the ACPI state

used for System

Suspend.

Section	Page
Contents	3
Notices	6
Safety information	7
About this guide	7
M4A78 PRO specifications summary	9
Chapter 1 Product introduction	13
1.1 Welcome!	13
1.2 Package contents	13
1.3 Special features	13
1.3.1 Product highlights	13
1.3.2 Innovative ASUS features	14
1.4 Before you proceed	16
1.5 Motherboard overview	17
1.5.1 Placement direction	17
1.5.2 Screw holes	17
1.5.3 Motherboard layout	18
1.5.4 Layout contents	18
1.6 Central Processing Unit (CPU)	19
1.6.1 Installing the CPU	19
1.6.2 Installing the heatsink and fan	20
1.7 System memory	22
1.7.1 Overview	22
1.7.2 Memory configurations	22
1.7.3 Installing a DIMM	27
1.7.4 Removing a DIMM	27
1.8 Expansion slots	28
1.8.1 Installing an expansion card	28
1.8.2 Configuring an expansion card	28
1.8.3 PCI slots	28
1.8.4 PCI Express x1 slots	28
1.8.5 PCI Express x16 slot	28
1.9 Jumpers	29
1.10 Connectors	31
1.10.1 Rear panel connectors	31
1.10.2 Internal connectors	34
1.11 Software support	43
1.11.1 Installing an operating system	43
1.11.2 Support DVD information	43
Chapter 2 BIOS information	45
2.1 Managing and updating your BIOS	45
2.1.1 Creating a bootable floppy disk	45
2.1.2 ASUS Update utility	46
2.1.3 ASUS EZ Flash 2 utility	47
2.1.4 AFUDOS utility	48
2.1.5 ASUS CrashFree BIOS 3 utility	49
2.2 BIOS setup program	50
2.2.1 BIOS menu screen	51
2.2.2 Menu bar	51
2.2.3 Navigation keys	52
2.2.4 Menu items	52
2.2.5 Submenu items	52
2.2.6 Configuration fields	52
2.2.7 General help	52
2.2.8 Pop-up window	52
2.2.9 Scroll bar	52
2.3 Main menu	53
2.3.1 System Time [xx:xx:xx]	53
2.3.2 System Date [Day xx/xx/xxxx]	53
2.3.3 Legacy Diskette A [1.44M, 3.5 in.]	53
2.3.4 Primary IDE Master/Slave	53
2.3.5 SATA 1–6	54
2.3.6 Storage Configuration	55
2.3.7 System Information	55
2.4 Ai Tweaker menu	56
2.4.1 AI Overclocking [Auto]	56
2.4.2 DRAM Frequency Control [Auto]	56
2.4.3 HT Link Speed [Auto]	57
2.4.4 Processor Voltage [Auto]	59
2.4.5 CPU/NB Voltage [Auto]	59
2.4.6 CPU VDDA Voltage [Auto]	60
2.4.7 DRAM Voltage [Auto]	60
2.4.8 HT Voltage [Auto]	60
2.4.9 NB Voltage [Auto]	60
2.4.10 NB 1.8V Voltage [Auto]	60
2.4.11 SB Voltage [Auto]	60
2.4.12 CPU Spread Spectrum [Enabled]	60
2.4.13 PCIE Spread Spectrum [Enabled]	60
2.4.14 SB Clock Spread Spectrum [Disabled]	60
2.5 Advanced menu	61
2.5.1 CPU Configuration	61
2.5.2 Chipset	62
2.5.3 Onboard Devices Configuration	64
2.5.4 USB Configuration	65
2.6 Power menu	65
2.6.1 Suspend Mode [Auto]	66
2.6.2 Repost Video on S3 Resume [No]	66
2.6.3 ACPI 2.0 Support [Disabled]	66
2.6.4 ACPI APIC Support [Enabled]	66
2.6.5 APM Configuration	66
2.6.6 Hardware Monitor	67
2.7 Boot menu	68
2.7.1 Boot Device Priority	68
2.7.2 Boot Settings Configuration	68
2.7.3 Security	69
2.8 Tools menu	70
2.8.1 ASUS EZ Flash 2	70
2.8.2 Express Gate [Enabled]	70
2.8.3 ASUS O.C. Profile	71
2.8.4 AI NET 2	71

Asus M4A78 PRO User Manual - Page 65

Power menu - usb boot

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