Biostar A770 A2G PLUS BIOS MANUAL

A770 A2G+ BIOS Manual

i

B IOS S etup.... ............ ............ ............ ............ ............ ............ .....................1

1 Main Menu...............................................................................................3

2 Adv an ced Me nu...... ............ ............ ............ ........................ ............ .........7

3 PCIPnP Menu........................................................................................1 7

4 Boot Me nu..............................................................................................20

5 Chipset Menu.........................................................................................22

6 Performance Me nu...............................................................................33

7 Exit Men u...............................................................................................35

A770 A2G+ BIOS Manual

BIOS Setup

Introducti on

The purpose of this manual is to describe the settings in the AMI BIOS Setup
program on this motherboard. The Setup program allows users to modify the basic

system configuration and save these settings to CMOS RAM. The power of CMOS
RAM is supplied by a battery so that it retains the Setup information when the power
is turned off.

Basic Input-Output System (BIOS) determines what a computer can do without
accessing programs from a disk. T his system controls most of the input and output

devices such as keyboard, m ouse, serial ports and disk drives. BIOS activates at the
first stag e o f the booting proc ess, l oading and executing the operating s ystem. S om e
additional features, such as virus and password protection or chipset fine-tuning
options are also included in BIOS.
T he rest of this manual will to guide you through the options and settings in BIOS
Setup.

Plug and P l ay Support

T his AMI BIOS supports the Plug and Play Version 1.0A specification.

EPA Green PC Support

T his AMI BIOS supports Version 1. 03 of the EPA Green PC speci fication.

APM Support

This AMI BIOS supports Version 1.1&1.2 of the Advanced Power Management
(AP M) speci fic atio n. Power m anag ement fe atu res a re implem ented vi a the System

Management Interrupt (SMI). Sleep and Suspend power management modes are
supported. P ower to the hard disk drives and video m onitors can also be managed by

this AMI BIOS.

ACPI Support

AMI ACPI BIOS support Version 1.0/2.0 of Advanced Configuration and Power
interface specifi cation (ACPI). It provides ASL code for pow er management and

device configuration capabilities as defined in the ACPI specific ation, developed by
Microso ft, Intel and T oshiba.

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A770 A2G+ BIOS Manual

PCI Bus Support

T his AMI BIOS also supports Version 2.3 of the Intel PCI (Peripheral Component
Int erconn ect) local b u s sp eci fi cati o n .

DRAM Support

DDR2 SDRAM (Doubl e Data Rate II Synchronous DRAM) i s supported.

Su ppor t e d CP Us

T his AMI BIOS supports the AMD C P U.

Usin g Setup

When starting up the computer, press

<Del> during the Power-On Self-Test
(POST) to enter the BIOS setup utility.

In the BIOS setup utility, you will see
General Help description at the top right

corner, and this is providing a brief
description of the selected item.
Navigation Keys for that particular menu

are at the bottom right corner, and you can
us e these keys to sele ct it em and ch ange
the settings.

Notice

z T he default BIOS settings apply for most conditions to ensure optimum performan ce

of the motherboard. If the system becomes unstable after changing any settings,
please load the default settings to ensure system’s compatibility and stability. Use

Load Setup Default under the Exit Menu.

z For better system performance, the BIOS firmware is being continuously updated.

T he BIOS i nformation described in this manual is for your refer ence only. The actual
BIOS informat ion and setti ngs on board may be s lightly different from t his manual.

z T he content of this manual is subject to be chang ed without notice. W e will not be

responsible for any mistakes found i n this user’s manual and any system damage that
may be caused by wrong-settings.

General Help

Navigation Keys

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A770 A2G+ BIOS Manual

1 Main Menu

Once you enter AMI BIOS S etup Utility, the Main Menu will appear on the screen
providing an overview of the basic system information.

Main Advanced PCIPnP Boot Chipset Performance

System Overview
AMI BIOS

Version :01.01.01
Build Date:01/01/08

System Memory

Size :

System Time 00

System Date [Tue 01/01/20 08]
Floppy A
> IDE Configuration

vxx.xx (C)Copyright 1985-200x, American Megatre nds, Inc.

AM I BI O S

Shows system information, including BIOS version and built date.

BIOS SETUP UTILITY

[ :00:00]

Exit

Use [ENTER], [TA B]
or [SHIFT-TAB] to
select a field.

Use [+] or [-] to
configure system Time.

Select Screen
Select Item

Change Field

+-

Select Field

Tab

General Help

F1

Save and Exit

F10

Exit

ESC

System M emory

Shows system memory size.

System Time

Set the system internal clock.

System Date

Set the system date. Note that the ‘Day’ automatically changes when you set the
date.

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A770 A2G+ BIOS Manual

Floppy A

Select the type of floppy disk drive inst alled in your syst em.
Options: 360K, 5. 25 in / 1.2M, 5. 25 in / 720K, 3.5 in / 1.44M, 3.5 i n /

2.88M, 3.5 in / None

IDE Configuration

The BIO S w i ll au t o m ati cal l y d etect t h e presence o f IDE/ SA TA d evices . T her e i s a
su b-menu fo r each IDE/S AT A device. Sel ect a device and press < Enter> to enter

the sub-menu of detailed opt ions.

Main

IDE Confuguration

> Primary IDE Master

> Primary IDE Slave
> SATA 1 Device

> SATA 2 Device
> SATA 3 Device
> SATA 4 Device

> SATA 5 Device
> SATA 6 Device

Hard Disk Write Protect [Disabled]
IDE Detect Time Out (Sec) [35]

BIOS SETUP UTILITY

While entering setup ,
BIOS auto detects th e
presence of IDE

devices. This displa ys
the status of auto

detection of IDE
devices.

Select Screen
Select Item

Go to Sub Screen

Enter

General Help

F1

Save and Exit

F10

Exit

ESC

vxx.xx (C)Copyright 1985-200x, American Megatrends, Inc.

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A770 A2G+ BIOS Manual

Primary IDE Master/Slave ; SATA 1/2/3/4/5/6 Device

Main

Primary IDE Master

Device :

Type [Auto]

LBA/Large Mode [Auto]
Block (Multi-Sector Transfer)[Auto]
PIO Mode [Auto]

DMA Mode [Auto]
S.M.A.R.T [Auto]

32Bit Data Transfer [Enabled]

vxx.xx (C)Copyright 1985-200x, American Megatrends, Inc.

BIOS SETUP UTILITY

Select the type
of device connected
to the system.

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

The BIOS detects the information and values of respective devices, and these
information and values are shown below t o the name of the sub-menu.

Type

Select the type of the IDE/SAT A drive.
Opti ons: Auto (De faul t) / C D/DVD / ARM D / Not Installed

LBA/Large Mode

Enable or disable the LB A mode.
Options: Auto (Default) / Disabled

Block (Multi-Sector Transfer)

En able o r d i s abl e mul ti- s ect or t rans fer.
Options: Auto (Default) / Disabled

PIO Mode

Select the PIO mode.
Options: Auto (Default) / 0 / 1 / 2 / 3 / 4

DMA Mode

Select the DMA mode.
Opti ons: Auto (De faul t) / SWDMA0 ~ 2 / MW DMA0 ~ 2 / UDMA0 ~ 5

S.M.A.R.T

Set the Smart Monit oring, Analysis, and Reporting T echnology.
Options: Auto (Default) / Disabled / Enabled

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A770 A2G+ BIOS Manual

32Bit Data Trans fer

Enable or disable 32-bit data transfer.
Options: Enabled (Default) / Disabled

Har d Disk Wr i te Protect

Disable or enable device write protection. T his will be effective only if the device
is accessed through BIOS .

Options: Disabled (De fault) / Enabled

IDE Detect Time Out (Sec)

Select the time out value for det ecting IDE/S ATA devices.
Options: 35 (Default) / 30 / 25 / 20 / 15 / 10 / 5 / 0

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A770 A2G+ BIOS Manual

2 Advanced Menu

T he Advanced Menu al lows you to configu re the settings of C PU, Super I/O, P ower
Management, and other system devices.

Notice

z Beware of that setting inappropriate values in items of this menu may cause

system to m alfuncti on.

Main Advanced PCIPnP Boot Chipset Performance

WARNING: Setting wrong values in below sec tions
may cause system to m alfunction.

> CPU Configuration

> Hyper Transport Configuratio n
> SuperIO Configuration
> Smart Fan Configuration

> Hardware Health Configuratio n
> Power Configuration
> USB Configuration

BIOS SETUP UTILITY

Configure CPU.Advanced Settings

Select Screen
Select Item

Go to Sub Screen

Enter

General Help

F1

Save and Exit

F10

Exit

ESC

Exit

vxx.xx (C)Copyright 1985-200x, Amer ican Megatre nds, Inc.

CPU Confi guration

T his item shows the C PU information that the BIOS automatically detects.

Advanced

CPU Configuration

Module Version:
AGESA Version:
Physical Count:
Logical Count:

AMD CPU
Revision:

Cache L1:
Cache L2:
Cache L3:
Speed : NB Clk:
Able to Change Freq :
uCode Patch Level :

Secure Virtual Machine Mode [Enabled]

PowerNow [Enabled]
ACPI SRAT Table [Enabled]

vxx.xx (C)Copyright 1985-200x, American Megatrends, Inc.

BIOS SETUP UTILITY

7

Enable/Disable
Secure Virtual Machine

Mode (SVM)

+­F1

F10
ESC

Select Screen
Select Item
Change Option

General Help
Save and Exit
Exit

A770 A2G+ BIOS Manual

Secur e Vi r t ual Ma chin e Mode

Virtualization T echnology can virtually separate your system resou rce into several
parts, thus enhance the performance when running virtual machines or multi
interfa ce systems.

Options: Enabled (Default) / Disabled

PowerNow

T his item allows you to enable or disable the PowerNow power saving technology.
Options: Enabled (Default) / Disabled

ACPI SRAT Ta bl e

The operat i n g sy s t em scans t h e ACPI S RAT at b oot t im e and u s es the i n format i o n t o
better allocate memory and schedule software threads for maximum performance.
This item controls whether the SRAT is made available to the operating system at
boot up, or not.
Options: Enabled (Default) / Disabled

Hyper Transport Configurati on

Advanced

Hyper Transport Configuration

NODE0:PCI-X2 HT Link

HT Link Speed : [ Auto]

HT Link Width : [ Auto]

BIOS SETUP UTILITY

The HyperTranspo rt
link will run at this
speed if it is slower

than or equal to the
system clock and the

board is capable.

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

vxx.xx (C)Copyright 1985-200x, Amer ican Megatre nds, Inc.

HT Link S peed

T his item allows you to determine the speed of Hyper Transport.
Options: Auto (Defaul t) / 200 MHz / 400 MHz / 600 MHz / 800MHz/ 1 GHz /

1. 2 GHz / 1.4 GHz / 1 . 6 GHz / 1.8 GHz

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A770 A2G+ BIOS Manual

H T Link Width

T his item allows you to determine the data width of Hyper T ransport.
Options: Auto (Default) / 4 Bit / 8 Bit / 16 Bit

S uperI O Co n f i g urati on

Advan c ed

Configure ITE8 7 18 Super IO Chipset

Onboard Floppy Controller [Enabled]

Serial Port1 A d dress [3F8/IRQ4]
Parallel Port A ddress [378]
Parallel Por t Mode [Normal]

Parallel Por t IRQ [IRQ7]
Keyboard Power O n [Disabled]
Mouse PowerOn [Disabled]
Restore on AC P ower Loss [Power Off]

BIOS SETU P UTILITY

Allows BIOS to Enable
or Disable Floppy

Controller

Select Screen
Select Item
Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

vxx . xx (C)Copyright 1985-200x, American M egatrends, Inc.

Onboard Floppy Controller

Select enabled if your system has a floppy disk controller (FDC) installed on the
system board and you wish to use it. If you installed another FDC or the system uses

no floppy drive, s elect disabled in this field.
Options: Enabled (Default) / Disabled

Serial Port1 Address

Select an address and corr espondi ng interrupt for the first and second serial ports.
Options: 3F8/IRQ4 (Default) / 2F8/ IRQ3 / 3E8/IRQ4 / 2E8/IRQ3 / Disabled

Parallel Port Address

Thi s it em all ows y o u to det erm ine acces s onboard paral lel port controller with which
I/O Address.

Options: 378 (Default) / 278 / 3B C / Di sabled

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A770 A2G+ BIOS Manual

Parallel Port M ode

T his item allows you to determine how the parallel port should functi on.
Options: Normal (Default) Using Parallel port as Standard Printer Port.

EPP Using Parallel Port as Enhanced Parallel Port.
ECP Using Parallel port as Extended Capabilities Port.

ECP+ EPP Using P arallel port as ECP & EPP mode.

ECP Mode DMA Channel

T his item allows you to select parallel port ECP DMA.
Opti ons: DMA3 (De fault) / DMA0 / DMA1

Parallel Port IRQ

T his item allows you to select the IRQ for the onboard parallel port.
Options: IR Q7 (Default) / IRQ5

Keyboard PowerOn

T his item allows you to control t he keyboard power on function.
Options: Disabl ed (Default) /Speci fic Key / Stroke Key

Specific Key Enter

T his item will show only when Keyboard PowerOn is set “Speci fic Key.”

Stroke Keys Selected

T his item will show only when Keyboard PowerOn is set “St roke Key.”
Options: Ctrl+F1 (Default) / Wake Key / Power Key / Ctrl+F2 / Ctrl+F3 /

Ctrl +F4 / Ctrl+F5 / Ctrl+F 6

Mouse PowerOn

T his item allows you to control t he mouse power on function.
Options: Disabled (De fault) / Enabled

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A770 A2G+ BIOS Manual

Restore on AC Power Loss

T his setting specifi es how your syst em should behave a ft e r a power fail or interrupts
occurs. By choosing Disabled will leave the computer in the power off state.

Choosing Enabled will restore the system to the status before power failure or
interrupt occurs.

Options: Power Off (Default) / P ower ON / Last State

Smart F an Configuration

Advan c ed

Smart Fan Conf i guration

CPU Smart Fan [Disabled]

Smart Fan Cali b ration
Control Mode

Fan Ctrl OFF( C)
Fan Ctrl On(C)
Fan Ctrl Start value
Fan Ctrl Sensi t ive

o

o

BIOS SETU P UTILITY

When you choice [Auto]
,[3Pin] or [4Pin],

please run the
calibration to define
the Fan parameters for
Smart Fan control

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

vxx . xx (C)Copyright 1985-200x, American M egatrends, Inc.

CPU Sm art Fa n

This ite m a llows you to contr ol the CPU Smart Fan functio n.
Options: Disabl ed (default) / Auto / 4-pin / 3-pin

Sm art Fan Cal ibr ation

Choose this item and then the BIOS will auto test and detect the CPU/System fan
functions and show CPU/S ystem fan speed.

Control Mode

T his item provides several operation modes of the fan.
Options: Quiet / Performance / Manual

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A770 A2G+ BIOS Manual

Fan Ctrl OFF(℃)

If the CP U/System T emperature is lower than the set value, F AN will turn off.
Options: 0~127 (℃)

Fan Ctrl On(℃ )

CPU/System fan starts to work under smart fan function when arrive this set value.
Options: 0~127 (℃)

Fan Ctrl S tart Value

When CPU/System temperature arrives to the set value, the CPU/System fan will
work under Smart F an F unction m ode.
Options: 0~127 (℃)

Fan Ctrl Sensiti ve

Increasing t h e val u e w ill rai s e t he sp eed of CP U/ Sy s t em fan.
Options: 1~127

Hardware H ealth Configuration

T his item shows the system temperature, fan speed, and voltage information.

Advan c ed

Hardware Healt h Configuration

H/W Health Fun c tion [Enabled]

Shutdown Tempe r ature [Disabled]

Temperatur e

SYS
CPU Temperatur e

CPU FAN Speed( J CFAN1)
CHIP FAN Speed ( JNFAN1)
SYS FAN Speed( J SFAN1)

CPU VCore
NB Voltage
+3.30V

+5.00V
+12.0V
DDR Voltage

HT Voltage
5VSB

vxx . xx (C)Copyright 1985-200x, American M egatrends, Inc.

BIOS SETU P UTILITY

12

Enables Hardware
Health Monitoring

Device.

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

A770 A2G+ BIOS Manual

H/W Health Functio n

If you computer contains a monitoring system, it will show P C health status during
P OST s t ag e.
Options: Enabled (Default) / Disabled

Shutdown Tempe rature

T his item allows you to set up the CPU shutdown Tem perature. This item is only
effective under W indows 98 ACPI mode.

Options: Disabled (Default) / 60℃/ 140℉ / 6 5 ℃/149℉ / 7 0 ℃/158℉ / 7 5℃/167℉

/ 80℃/ 176℉ / 85 ℃/185℉ / 90 ℃/194℉

Power Configuration

Advanced

ACPI Settings

Suspend mode [S1 (POS)]

ACPI Version Features [ACPI v1.0]
ACPI APIC support [Enabled]

AMI OEMB table [Enabled]
Headless mode [Disabled]

RTC Resume [Disabled]
RTC Alarm Date(Days)

System Time
USB Wakeup From S3/S4 [Disabled]
Power On by LAN [Disabled]
Wake on Ring [Disabled]

BIOS SETUP UTILITY

Select the ACPI
state used for
System Suspend.

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

vxx.xx (C)Copyright 1985-200x, American Megatre nds, Inc.

Suspe nd m ode

T he item allows you to select the suspend type under the ACP I operating system.
Opt i ons : S1 (P OS) (Defau l t ) Power on S usp end
S3 (STR) Suspend to RAM
Auto POS+STR

Repost Video on S3 Resume

T he item allows you to determine whether to invoke VGA BIOS post on S3/STR
resum e .
Options: No (Default) / Yes

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A770 A2G+ BIOS Manual

ACPI Version Features

The it em all o ws y ou t o sel ect t he vers i o n of AC PI.
Options: ACPI v1.0 (Default) / ACP I v2.0 / ACPI v3.0

ACPI AP IC support

This item is used to enable or disable the motherboard's APIC (Advanced
Programmable Interrupt Controller). The APIC provides multiprocessor support,

more IRQs and faste r int errupt handling.
Options: Enabled (Default) / Disabled

AMI OEMB tabl e

Set this value to allow the ACPI BIOS to add a pointer to an OEMB table in the Root
Syst em Description Table (RSDT ) table.
Options: Enabled (Default) / Disabled

Headless mode

This is a server-specific feature. A headless server is one that operates without a
keyboard, monitor or mouse. To run in headless mode, both BIOS and operating

system (e.g. Windows Server 2003) must support headless operation.
Options: Disabled (De fault) / Enabled

RTC Resume

When “ Enabled”, you can set the date and time at which the RT C (real-time clock)
alar m awaken s th e s ys tem from S u s pen d mod e.

Options: Disabled (De fault) / Enabled

RTC Alarm Date (D ays)

You can choose which date the system will boot up.

RTC Ala r m Tim e (HH:MM :SS)

You can choose the system boot up time, input hour, minute and second to specify.

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A770 A2G+ BIOS Manual

USB Wakeup from S3/S4

T his item allows you to enable or disabled the USB resume from S 3/S4 function.
Options: Disabled (De fault) / Enabled

Powe r On by LAN

T his item allows you control t he wake on LAN (WOL) function.
Options: Disabled (De fault) / Enabled

Wake O n Ring

T his item allows you control t he wake on ring function.
Options: Disabled (De fault) / Enabled

USB Confi guration

T his item shows the USB controll er and using USB device information.

Advanced

USB Configuration

Module Version - 2.24.3-13.4

USB Devices Enabled:

Legacy USB Support [Enabled]

USB 2.0 Controller Mode [HiSpeed]
BIOS EHCI Hand-Off [Enabled]

> USB Mass Storage Device Configuration

BIOS SETUP UTILITY

Enables support for
legacy USB. AUTO
option disables

legacy support if
no USB devices are

connected.

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

vxx.xx (C)Copyright 1985-200x, American Megatre nds, Inc.

Legacy USB Support

T his item determines if the BIOS should provide legacy support fo r USB devices
li ke the key board, mous e, and USB dri ve. T hi s is a useful fe ature when usin g such
USB devices with operating systems that do not natively support USB (e.g.
Microsoft DOS or Windows NT).

Options: Enabled (Default) / Disabled / Auto

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A770 A2G+ BIOS Manual

USB 2.0 Controller Mode

T his item allows you to select the operation mode of the USB 2.0 cont roller.
Options: HiSpeed (De fault) US B 2.0-480Mbps
FullSpeed USB 1.1-12Mbps

BIO S EHCI Hand-Off

This item allows you to enable support for operating systems without an EHCI
hand-off feature.

Options: Enabled (Default) / Disabled

US B Ma ss S tor age Devi ce C on f i g urat i on

Advanced

USB Mass Storage Device Configuration

USB Mass Storage Reset Delay [20 Sec]

Device #

Emulation Type [Auto]

vxx.xx (C)Copyright 1985-200x, American Megatrends, Inc.

BIOS SETUP UTILITY

Number of seconds
POST waits for the
USB mass storage

device after start
unit command.

Select Screen
Select Item

+-

Change Option

F1

General Help

F10

Save and Exit

ESC

Exit

USB Mass Storage Reset Delay

T his item allows you to set the reset delay for USB mass storage device.
Op t i ons : 20 S ec (D e fau l t ) / 1 0 Sec / 3 0 Sec / 40 Sec

E m ulati o n T ype

T his item allows you to select the emulation type of the USB mass storage device.
Options: Auto (Default) / Floppy / Forced FDD / Hard Disk / CDROM

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A770 A2G+ BIOS Manual

3 PCIPnP Menu

T his section describes configuring the PCI bus system. PCI, or Personal Computer
Interconn ect, is a system which allows I/O devices to operate at speeds nearing the

speed o f the CPU itself uses when communicating with its own special components.

Notice

z Beware of that setting inappropriate values in items of this menu may cause

system to m alfuncti on.

Main Advanced PCIPnP Boot Chips et Performa nce

Advanced PCI/PnP Settings
WARNING: Setting wrong values in below sec tions

may cause system to malfunction.

Clear NVRAM [No]

Plug & Play O/S [No]
PCI Latency Timer [64]

Allocate IRQ to PCI VGA [Yes]
Palette Snooping [Disabled]
PCI IDE BusMaster [Enabled]

> PCI Resource
> PCI Express Configuration

BIOS SETUP UTILITY

Clear NVRAM during
System Boot.

+­F1
F10
ESC

Exit

Select Screen
Select Item

Change Option
General Help
Save and Exit
Exit

vxx.xx (C)Copyright 1985-200x, American Megatre nds, Inc.

Clear NVRAM

T his item allows you to clear the data in the NVRAM (CMOS) by selecting “ Yes”.
Options: No (Default) / Yes

Plug & Play OS

When set to YES, BIOS will only initialize the PnP cards used for the boot sequen ce
(VGA, IDE, SCSI). The rest of the cards will be initialized by the PnP operating
system like Window™ 95. When set to NO, BIOS will initialize all the PnP cards.
For non-PnP operating systems (DOS, Netware™), this option must set to NO.
Options: No (Default) / Yes

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A770 A2G+ BIOS Manual

PCI Latency Ti m er

T his item cont rols how long a PCI device can hold the PCI bus before anot her takes
over. T he longer the latency, the longer the PCI device can retain control of the bus

before handing it over to another PC I device.
Options: 64 (Default) / 32 / 96 / 128 / 160 / 192 / 224 / 248

Al locate IRQ to P CI VGA

T his item allows B IOS to choose an IRQ t o assign for the PCI VGA card.
Opti ons: Yes (De fault) / No

Pale tte Snooping

Som e old graphic controllers need to “ snoop” on t he VGA palette and then map it to
their display as a way to provide boot information and VGA compatibility. This item

allows such snooping to take place.
Options: Disabled (De fault) / Enabled

PCI IDE BusMaster

T his item is a toggle for the built-in driver that allows the onboard IDE controller to
perform D M A (Direct M em o ry Access ) tran sfers .

Options: Enabled (Default) / Disabled

PCI Resource

PCIPnP

PCI Resource

IRQ3 [Available]

IRQ4 [Available]
IRQ5 [Available]

IRQ7 [Available]
IRQ9 [Available]
IRQ10 [Available]

IRQ11 [Available]
IRQ14 [Available]
IRQ15 [Available]

DMA Channel 0 [Available]
DMA Channel 1 [Available]
DMA Channel 3 [Available]

DMA Channel 5 [Available]
DMA Channel 6 [Available]
DMA Channel 7 [Available]

Reserved Memory Size [Disabled]

vxx.xx (C)Copyright 1985-200x, American Megatrends, Inc.

BIOS SETUP UTILITY

18

Available: Specified
IRQ is available to be

used by PCI/PnP
devices.

Reserved: Specified
IRQ is reserved for
use by Legacy ISA

devices.

Select Screen
Select Item

+-

Change Option

F1

General Help

F10

Save and Exit

ESC

Exit

A770 A2G+ BIOS Manual

IRQ3/4/5/7/9/1 0/11/14/15

T hese items will allow you to assign each system interrupt a type, depending on the
type of device using the interrupt. The option “Available” means the IRQ is going
to assign automatically.

Options: Available (Default) / Reserved

DMA Channel 0/1/3/5/6/7

T hese items will allow you to assign each DMA channel a type, depending on the
type of device using the channel. The option “Available” means the channel is

going to assign automatically.
Options: Available (Default) / Reserved

Reser ved M em or y Siz e

T his item allows BIOS to reserve certain memory size for specific PCI device.
Options: Disabl ed (Default) / 16K / 32K / 64K

PCI Express Configuration

PCIPnP

PCI Express Configuration

Active State Power-Management[Disabled]

BIOS SETUP UTILITY

Enable/Disable
PCI Express L0s and
L1 link power

states.

Select Screen
Select Item

+-

Change Option

F1

General Help

F10

Save and Exit

ESC

Exit

vxx.xx (C)Copyright 1985-200x, American Megatrends, Inc.

Active St ate Po wer-M anagement

This item sets the ASPM configuration for the PCI Express devices before the
operating system boots. T his function is for OS which does not s upport ASP M .

Options: Disabled (De fault) / Enabled

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A770 A2G+ BIOS Manual

4 Boot Menu

T his menu allows you to setup the system boot opt ions.

Main Advanced PCIPnP Boot Chips et Performa nce

Boot Settings Conf iguration

> Boot Device Prio rity

> Hard Disk Drives
> Removable Drives

> CD/DVD Drives

Quick Boot [ Enabled]
Full Screen LOGO S how [ Enabled]

AddOn ROM Display Mode [ Force BIOS]
Bootup Num-Lock [ ON]
Interrupt 19 Captu re [ Enabled]
Ignore Memory Erro r Messages [ Disabled]

BIOS SETUP UTILITY

Exit

Specifies the
Boot Device
Priority sequenc e.

Select Screen
Select Item

Go to Sub Scr een

Enter
F1

General Help
Save and Exit

F10

Exit

ESC

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Boot Device Priority

Items in this sub-menu specify the boot device priority sequence from the available
devices. The number of device items that appears on the screen depends on the
number of devices installed in the system.
Options: Removable / Hard Disk / CDROM / Legacy LAN / Disabled

Hard Disk Drives

T he BIOS will attempt to arrange the h ard d isk boot seq uen ce automatical ly. You
can also ch an ge th e b o oti n g sequen ce. T h e n u mber o f devi ce i t ems t h at ap p ears o n

the screen depends on the number of devices installed in the s ystem.
Op t i ons : P ri. M as t er / Pri. S l ave / Sec. Mast er / Sec. Slave / US B HDD0 /

USB HDD1 / USB HDD2 / Bootable Ad d-in Cards

Re mo va ble Dr ives

T he BIOS will attempt t o arrange th e remov able drive boot seq uence auto mati cally.
You can also change the booting sequence. The number of device items that

appears on the screen depends on the number of devic es installed in the system .
Options: Floppy Disks / Zip100 / USB-FDD0 / USB-FDD1 / USB-ZIP0 /

USB-ZIP1 / LS 120

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A770 A2G+ BIOS Manual

CD/DV D Drives

T he BIOS will attempt t o arrange the CD/DVD drive boot sequence automatically.
You can also change the booting sequence. The number of device items that

appears on the screen depends on the number of devic es installed in the system .
Op t i ons : P ri. M as t er / Pri. S l ave / Sec. Mast er / Sec. Slave / US B C DROM0 /

USB CDROM 1

Quick Boot

Enabling this option will cause an abridged version of the Power On Self-Test
(POST) t o execute after you power up the computer.
Options: Enabled (Default) / Disabled

Full Screen LOGO Show

T his item allows you to enable/disable Ful l Screen LOGO Show fun ction.
Options: Enabled (Default) / Disabled

AddOn ROM Display Mode

T his item sets the display mode for option ROM.
Op t i ons : F orce BIO S (Default) / Keep Cur ren t

Boot u p Num- Lock

Selects the NumLock State after the system switched on.
Options: ON (Default) / OFF

Interrupt 19 Capture

When set to Enabled, this item allows the option ROMs to trap interrupt 19.
Options: Enabled (Default) / Disabled

I gnore Memory Error Messages

W hen set to Enabled, BIOS would ignore memory error messages.
Options: Disabled (De fault) / Enabled

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A770 A2G+ BIOS Manual

5 C hipset Menu

Thi s su b m en u all o ws you to co nfi g u re t he sp eci fic feat u res of t he chi ps et i n s tal l ed o n
your system. This chipset manage bus speeds and access to system memory

resources, such as DRAM. It also coordinates communi cations with the P C I bus.

Main Advanced PCIPnP Boot Chips et Performa nce

> NorthBridge Conf iguration

> SouthBridge Conf iguration
> RX780 Configurat ion

> OnBoard Peripher als Configur ation

BIOS SETUP UTILITY

Options for NBAdvanced Chipset S ettings

Select Screen
Select Item

Go to Sub Scr een

Enter

General Help

F1

Save and Exit

F10

Exit

ESC

Exit

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Nort h Br i dge Configu r at ion

NorthBridge Chipse t Configurat ion

> Memory Configura tion

> ECC Configuratio n
> DRAM Timing Conf iguration

Memory CLK :
CAS Latency(Tcl) :
RAS/CAS Delay(Trcd ) :
Row Precharge Time (Trp) :
Min Active RAS(Tra s) :
RAS/RAS Delay(Trrd ) :

Row Cycle (Trc) :

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

BIOS SETUP UTILITY

Chipset

22

Select Screen
Select Item

Enter

Go to Sub Scr een

F1

General Help

F10

Save and Exit

ESC

Exit

A770 A2G+ BIOS Manual

M emory Configura tion

BIOS SETUP UTILITY

Memory Configurati on

Bank Interleaving [ Auto]

Channel Interleavi ng [ XOR of Addre ss bit]
Enable Clock to Al l DIMMs [ Disabled]

MemClk Tristate C3 /ATLVID [ Disabled]
Memory Hole Remapp ing [ Enabled]
DCT Unganged Mode [ Always]
Power Down Enable [ Enabled]

Power Down Mode [ Channel]

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Chipset

Enable Bank Memo ry
Interleaving

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10
ESC

Exit

B a n k Int er l eaving

Bank Interleaving is an advanced chipset technique used to improve memory
performance. Memory interleaving increases bandwidth by allowing simultaneous
acc ess t o m o re than o ne pi ece o f m em o ry.
Options: Auto (Default) / Disabled

Channel Interleaving

T his item enables or disables Channel Memory Interleaving.
Options: XOR of Address bits [20:16, 6] (Default) / XOR of Address bits

[20:16, 9] / Address bits 6 / Address bits 12 / Disabled

En able Clock to All DIM Ms

This item determines whether the BIOS should actively reduce EMI
(Electromagnetic Interference) and reduce power consumption by turning off

unoccupied or i nactive DIMM slots.
Options: Disabled (De fault) / Enabled

MemClk Tristate C3/ATLVID

T his item enables or disables the MemClk Tristate function in C3 / Alt VID Mode.
Options: Disabled (De fault) / Enabled

Memory Hole Remapping

This item allows you to enable or disable the remapping of the overlapped PCI
memory above the total physi cal memory. Only 64-bit OS supports this function.

Options: Enabled (Default) / Disabled

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A770 A2G+ BIOS Manual

DCT Ungan ged Mode

This item controls the DRAM controller ganged (128bit*1) / unganged (64bit*2)
dual-channel operation mode. If two DRAM modules with different size are

installed, using unganged mode can still m ake it run in dual-channel operation.
Options: Always (Default) / Auto

Power Down Enable

T his item controls the DRAM power down function.
Options: Enabled (Default) / Disabled

Power Down Mode

T his item allows you to select the DR AM power down mode.
Options: Channel (Default) / Chip S elect

ECC Configur ation

BIOS SETUP UTILITY

ECC Configuration

ECC Mode [ Disabled]

DRAM ECC Enable [Disabled]
DRAM SCRUB REDIR ECT [ Disabled]

4-Bit ECC Mode [ Disabled]
DRAM BG Scrub [ Disabled]
Data Cache BG Sc rub [ Disabled]
L2 Cache BG Scru b [ Disabled]

L3 Cache BG Scru b [ Disabled]

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Chipset

T-Series

Set the level of ECC
protection. Note : The
Super ECC mode

dynamically sets the
DRAM scrub rate so

all of memory is
scrubbed in 8 ho urs.

+­F1

F10
ESC

ECC M o de

T his item allows you to select the DR AM ECC Mode.
Options: Disabl ed (Default) / Basic / Good / Super / M ax / User

DRAM ECC En a bl ed

Options: Disabled (De fault) / Enabled

Select Screen
Select Item

Change Option
General Help
Save and Exit
Exit

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A770 A2G+ BIOS Manual

DRAM SCRUB REDIRECT

Options: Disabled (De fault) / Enabled

4-Bit ECC Mode

Options: Disabled (De fault) / Enabled

DR AM BG S cru b / Da ta Ca ch e BG Scr ub/L 2 C a che B G Scru b / L 3 Cach e B G Scrub

Options: Disabl ed (Default) / 40ns / 80ns / 160ns / 320ns / 640ns / 1.28us / 2.56 us

/ 5.12us / 10.2us / 20.5us / 41.0us / 81.9us/ 163.8us / 327.7us / 655.4us /

1.31ms/ 2. 62ms / 5.24ms / 10.49ms / 20.97ms / 42.00ms / 84.00ms

DRAM Ti m i ng Configuration

BIOS SETUP UTILITY

DRAM Timing Config uration

Memory Clock Mode [ Auto]

Memclock Value [ 200 MHz]
DRAM Timing Mode [ Auto]

CAS Latency (CL) [ Auto]
2T Command [ Auto]
TRCD [ Auto]
TRP [ Auto]

tRTP [ Auto]
TRAS [ Auto]
TRC [ Auto]
tWR [ Auto]
TRRD [ Auto]
tWTR [ Auto]
tRRC0 [ Auto]

tRRC1 [Aut o]
tRRC2 [ Auto]
tRRC3 [ Auto]

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Chipset

Select the DRAM
Frequency progra mming
method. If Auto,

the DRAM speed w ill
be based on SPDs .

If Limit, the DR AM spe
will not exceed the
specified value. If
Manual, the DRAM speed

specified will b e
programmed regar dless.

Select Screen
Select Item

Change Option

+­F1

General Help

F10

Save and Exit

ESC

Exit

Memory Clock Mode

T his item allows you to control t he Memory C lock.
Options: Auto (Default) / Limit / Manual

Memclock Value

T his item allows you to set the Memory Clock.
Options: 200MHz (Default) / 266MHz / 333MHz / 400MHz / 533MHz

DRAM Timing Mode

T his item allows you to choose to manually or automatically regul ate the DRAM
Timing.

Options: Auto (Default) / DCT0 / DCT1(for AM2+ C PU) / Both(for AM2+ CPU)

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A770 A2G+ BIOS Manual

CAS Latency (CL)

Options: Auto (Default) / 3~6 CLK / 7CLK DH_Only

2T Command

Options: Auto (Default) / 1T / 2T

TRCD

Options: Auto (Default) / 3~6 CLK

TRP

Options: Auto (Default) / 3~6 CLK

tRTP

Options: Auto (Default) / 2-4 CLK / 3-5 CLK

TRAS

Options: Auto (Default) / 5~18 CLK

TRC

Options: Auto (Default) / 11~26 CLK

tWR

Options: Auto (Default) / 3~6 CLK

TRRD

Options: Auto (Default) / 2~5 CLK

tWTR

Options: Auto (Default) / 1~3 CLK

tRFC0 / tRFC1 / tRFC2 /tRFC3

Options: Auto (Defaul t) / 75ns / 105ns / 127.5ns / 195ns / 327.5ns

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A770 A2G+ BIOS Manual

S outhBridge C o nfi gu ra ti o n

BIOS SETUP UTILITY

SouthBridge Chipse t Configurat ion

SB700 CIMx Verison : 3.1.0

> SB Azalia Audio Configuratio n

OHCI HC(Bus 0 Dev 18 Fn o) [ Enabled]
OHCI HC(Bus 0 Dev 18 Fn 1) [ Enabled]
EHCI HC(Bus 0 Dev 18 Fn 2) [ Enabled]

OHCI HC(Bus 0 Dev 19 Fn 0) [ Enabled]
OHCI HC(Bus 0 Dev 19 Fn 1) [ Enabled]
EHCI HC(Bus 0 Dev 19 Fn 2) [ Enabled]
OHCI HC(Bus 0 Dev 20 Fn 5) [ Enabled]

OnChip SATA Channe l [ Enabled]
OnChip SATA Type [ Native IDE]

SATA IDE Combined Mode [ Enabled]

Power Saving Featu res [ Disabled]

SB Aza li a Audio Configur ation

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Chipset

Options for SB H D Azal

Select Screen
Select Item

Go to Sub Scr een

Enter
F1

General Help
Save and Exit

F10

Exit

ESC

BIOS SETU P UTILITY

HD Audio Azali a Device [Enabled] Options

vxx .xx (C)Copyright 1985-200x, American Me gatrends, Inc.

Chipset

H D Au d i o A zal i a D evice

T his item allows you to control t he HD audio device.
Options: Enabled (Default) / Disabled

OHCI HC(Bus 0 Dev 18/19/20 Fn 0/1/5)

Options: Enabled (Default) / Disabled

27

Auto
Disabled
Enabled

+­F1

F10
ESC

Select Screen
Select Item
Change Option

General Help
Save and Exit
Exit

A770 A2G+ BIOS Manual

EHCI HC(Bus 0 Dev 18/19 Fn 2)

Options: Enabled (Default) / Disabled

OnChip SATA Channel

T his option allows you to enable the on-chip Serial AT A.
Options: Enabled (Default) / Disabled

OnChip S ATA Type

T his option allows you to select the on-chip Serial ATA operation mode.
Options: Native IDE (Default) / RAID / AHCI / Legacy IDE / IDEÆ AHCI

Option ROM POST Delay

Options: Disabl ed (Default) / 1 ~ 7 S econds

SATA IDE Combined M ode

T his option controls the SATA/PATA combined mode.
Options: Enabled (Default) / Disabled

Power Saving Feat ures

T his option allows you to Disable/Enable power saving features in SB. As general
rule, this feature should be di sabled for desktop and enabl ed fo r mobile.
Options: Disabled (De fault) / Enabled

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A770 A2G+ BIOS Manual

RX780 Configuration

BIOS SETUP UTILITY

RX780 Configuratio n

> PCI Express Conf iguration

Primary Video Cont roller [ PCIE-GFX0-GF X2-GPP]

Chipset

PCI Express Conf igurat

Select Screen
Select Item

Go to Sub Scr een

Enter
F1

General Help
Save and Exit

F10

Exit

ESC

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

PCI Express C onfig uration

BIOS SETUP UTILITY

PCI Express Config uration

Peer-to-Peer among GFX/GFX2 [ Disabled]

GPP Slots Power Li mit, W [ 25 ]
> Port #02 Feature s

> Port #04 Feature s
> Port #05 Feature s

> Port #06 Feature s
> Port #07 Feature s
> NB-SB Port Featu res

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Chipset

Options

Enabled
Disabled

Select Screen
Select Item

Enter

Update

F1

General Help
Save and Exit

F10

Exit

ESC

29

A770 A2G+ BIOS Manual

Peer -to-P eer Am o ng GFX/ GFX2

Options: Disabled (De fault) / Enabled

GPP S l ots Pow er Limit , W

Options: 25 (Default) / 0-255

Port #02/04/05/06/07 Fe ature s

Gen2 High Speed Mo de [ Disabled]

Link ASPM [ Disabled]
Link Width [ Auto]

Slot Power Limit, W [ 75]

BIOS SETUP UTILITY

Chipset

Auto - RC only
advertize Gen2
capability.

Select Screen
Select Item

Change Option

+-

General Help

F1

Save and Exit

F10
ESC

Exit

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Gen2 H igh S peed Mode

Options: Disabled (Default) / Auto / Software Initiated / Advertised RC

Link ASPM

Options: Disabled (Default) / L0s / L1 / L0s & L1

Li nk Wi dth

Opti ons: Auto (Default) / x1 / x2 / x4 / x8 / x16

Sl ot Power Lim it, W

Opti ons: 75 (Defaul t) / 0-255

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A770 A2G+ BIOS Manual

NB-SB Po rt Featu res

NB-SB Link ASP M [Disabled]

NP NB-SB VC1 T raffic Support [Disabled]

BIOS SETU P UTILITY

Chipset

Options

Disabled
L1

Select Screen
Select Item

+-

Change Option

F1

General Help
Save and Exit

F10

Exit

ESC

vxx .xx (C)Copyright 1985-200x, American Me gatrends, Inc.

NB-SB Link ASPM

Options: Disabled (Default) / L1

NP NB-SB V C1 T raffic Su p port

Options: Disabled (Default) / Enabled

Pri mary Vide o Controll e r

T his option allows you to select the video controller in charge.
Options: PCIE GFX0-GFX2-GPP-PCI (Default)

PCIE GFX2-GFX0-GPP-PCI
PCIE GPP-GFX0-GFX2-PCI

PCI-PCIEGFX0-GFX2-GPP

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A770 A2G+ BIOS Manual

OnBoard Peripherals Configuration

BIOS SETU P UTILITY

MAC ID Informa tion

Realtek PCIE N IC [Enable]

Realtek Optio n ROM [Disabled]

Chipset

Enable/Disable
Onboard Broadcom

PCIE Network
Controller

Select Screen
Select Item
Change Option

+-

General Help

F1

Save and Exit

F10

Exit

ESC

vxx .xx (C)Copyright 1985-200x, American Me gatrends, Inc.

MAC ID Information

Thi s area sh o ws t he MAC ID .

Realtek PCIE NIC

T his option allows you t o control the onboard LAN controller.
Options: Enable (Default) / Disable

Realtek Option ROM

T his item allows you to enable or disable the Onboard LAN Boot ROM.
Options: Disabled (De fault) / Enabled

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A770 A2G+ BIOS Manual

6 Performance Menu

T his submenu allows you to change voltage and clock of various devices.
(However, we suggest you use the default setting. Changing the voltage and clock

improperly may damage the device.)

Notice

z Beware of that setting inappropriate values in items of this menu may cause

system to m alfuncti on.

Main Advanced PCIPnP Boot Chips et Performance

Performance Settin gs
WARNING: Setting w rong values in below sec tions

may cause system to m alfunction.

CPU Over Voltage [StartUp]

Memory Over Voltag e [1.95V]
Chipset Over Volta ge [1.15V]

HT Over Voltage [1.20V]

CPU Frequency, MHz [200]

BIOS SETUP UTILITY

Exit

Change CPU volta ge
value.

Select Screen
Select Item

Enter

Go to Sub Scr een

F1

General Help
Save and Exit

F10

Exit

ESC

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

CPU Over Voltage

T his item allows you to select CP U voltage value.
Options: S tartUp (Default) / +0.05V / +0.10V / +0. 15V

Memory Ov er V oltage

T his item allows you to select DDR voltage value.
Options: 1. 95V (De faul t) / 2.05V / 2.15V / 2.25V / 2.35V / 2.45V / 2.55V / 2.65V

Ch ipset Over Voltage

T his item allows you to change chipset vol tage val ue.
Options: 1. 15V (De faul t) / 1.20V / 1.25V / 1.30V

33

A770 A2G+ BIOS Manual

HT Over Voltage

T his item allows you to change Vtt voltage value.
Options: 1. 20V (De faul t) / 1.25V / 1.30V / 1.35V

CPU Fr e que nc y

T his item allows you to select the CPU Over Clock.
Options: 200 (MHz) (Default) / 200-600

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A770 A2G+ BIOS Manual

7 Exit Menu

This menu allows you to load the optimal default settings, and save or discard the
changes to the B IOS items.

Main Advanced PCIPnP Boot Chips et Performance

Exit Options

Save Changes and E xit

Discard Changes an d Exit
Discard Changes

Load Optimal Defau lts

Security Settings

> Security

vxx.xx (C)Copyright 198 5-200x, Amer ican Megatre nds, Inc.

Save Changes a nd Exit

BIOS SETUP UTILITY

Exit

Exit system setu p
after saving the
changes.

F10 key can be u sed
for this operati on.

Select Screen
Select Item

Go to Sub Scr een

Enter
F1

General Help
Save and Exit

F10

Exit

ESC

Save all configuration changes to CMOS R AM and exit setup.

Di scard Changes and Exi t

Abandon all changes made during the current sessi on and exit setup.

Di scard Changes

Abandon all changes made during the current session and restore the previously
saved values.

Load Optim al Defaults

This selection allows you to reload the BIOS when problem occurs during system
booting sequence. These configurations are factory settings optimized for this

system.

35

A770 A2G+ BIOS Manual

Security

T his sub-menu allows you t o provide/revise supervisor and user password.

BIOS SETU P UTILITY

Exit

Security Setti ngs

Supervisor Pas sword :Not Installed
User Password :Not Installed

Change Supervi sor Password

User Access Le vel [Full Access]
Change User Pa ssword
Clear User Pas sword
Password Check [Setup]

Boot Sector Vi rus Protection [Disabled]

vxx .xx (C)Copyright 1985-200x, American Me gatrends, Inc.

Install or Change the
password.

Select Screen
Select Item
Change

Enter

General Help

F1

Save and Exit

F10

Exit

ESC

Change Supervi s or P assword

Setting the supervisor password will prohibit everyone except the supe rvisor from
making changes using the CMOS Setup Utility. You will be prompted with to enter a
password.

User Acess Level

T his item allows supervisor to set the user level.
Op t i ons : F ull Acces s (Defaul t) / No A ccess / V iew On l y / Lim i t ed

Cha nge Us er Password

If the Supervisor Password is not set, then the User Password will function in the
same way as the Supervi sor Password. If the Supervisor Password is set and the User
Password is set, the “User” will only be able to view configurations but will not be
abl e to ch an g e th em.

Cle ar Use r Password

T his item is for clearing user passwo rd.

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A770 A2G+ BIOS Manual

P assw ord Check

T his item is for setting the timing that checking password.
Options: Setup (Default) / Always

Boot S e ctor V i rus Protection

T his option allows you to choose the VIRUS W arning feature that is used to protect
the IDE Hard Disk boot sector. I f this fun ction is enabled and an attempt is made to

write to the boot sector, BIOS will display a warning message on the screen and
sound an al arm beep.

Options: Disabled (De fault) / Enabled

37