Biostar A55MD2 User manual

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

UEFI BIOS Setup ........................................................................... 1

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

2 Advanced Menu.......................................................................... 4

3 Chipset Menu............................................................................ 15

4 Boot Menu................................................................................. 20

5 Security Menu........................................................................... 23

6 Performance Menu................................................................... 24

7 Exit Menu .................................................................................. 30

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

UEFI BIOS Setup

Introduction

The purpose of this manual is to describe the settings in the AMI UEFI BIOS

Setup program on this motherboard. The Setup program allows users to

modify the basic system configuration and save these settings to NVRAM.

UEFI BIOS determines what a computer can do without accessing programs

from a disk. This system controls most of the input and output devices such

as keyboard, mouse, serial ports and disk drives. BIOS activates at the first

stage of the booting process, loading and executing the operating system.

Some additional features, such as virus and password protection or chipset

fine-tuning options are also included in UEFI BIOS.

The rest of this manual will to guide you through the options and settings in

UEFI BIOS Setup.

Plug and Play Support

This AMI UEFI BIOS supports the Plug and Play Version 1.0A specification.

EPA Green PC Support

This AMI UEFI BIOS supports Version 1.03 of the EPA Green PC

specification.

ACPI Support

AMI ACPI UEFI BIOS support Version 1.0/2.0 of Advanced Configuration

and Power interface specification (ACPI). It provides ASL code for power

management and device configuration capabilities as defined in the ACPI

specification, developed by Microsoft, Intel and Toshiba.

PCI Bus Support

This AMI UEFI BIOS also supports Version 2.3 of the Intel PCI (Peripheral

Component Interconnect) local bus specification.

DRAM Support

DDR3 SDRAM (Double Data Rate III Synchronous DRAM) is supported.

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

Supported CPUs

This AMI UEFI BIOS supports the latest

CPU.

Using Setup

When starting up the computer, press <Del>

during the Power-On Self-Test (POST) to

enter the UEFI BIOS setup utility.

In the UEFI 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 use these

keys to select item and change the settings.

Notice

The default UEFI BIOS settings apply for most conditions to ensure

optimum performance 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.

For better system performance, the UEFI BIOS firmware is being

continuously updated. The UEFI BIOS information described in this

manual is for your reference only. The actual UEFI BIOS information

and settings on board may be slightly different from this manual.

The content of this manual is subject to be changed without notice. We

will not be responsible for any mistakes found in this user’s manual and

any system damage that may be caused by wrong-settings.

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

1 Main Menu

Once you enter AMI UEFI BIOS Setup Utility, the Main Menu will appear on

the screen providing an overview of the basic system information.

BIOS Information

It shows system information including UEFI BIOS version, Project Code,

Model Name, Build Date and etc.

Total Memory

Shows system memory size, VGA shard memory will be excluded.

System Language

Choose the system default language.

System Date

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

the date.

System Time

Set the system internal clock.

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

2 Advanced Menu

The Advanced Menu allows you to configure the settings of CPU, Super I/O,

Power Management, and other system devices.

Notice

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

system to malfunction.

PCI Subsystem Settings

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

PCI Latency Timer

This item sets the value to be programmed into PCI Latency Timer Register.

Options: 32 PCI Bus Clocks (Default) / 64 PCI Bus Clocks / 96 PCI Bus

Clocks / 128 PCI Bus Clocks / 160 PCI Bus Clocks / 192 PCI Bus

Clocks / 224 PCI Bus Clocks / 248 PCI Bus Clocks

VGA Palette Snoop

This item enables or disables VGA Palette Registers Snooping.

Options: Disabled (Default) / Enabled

PCI Express Settings

No Snoop

This item enables or disables PCI Express Device No Snoop option.

Options: Enabled (Default) / Disabled

Maximum Payload

This item sets Maximum Payload of PCI Express Device or allows System

BIOS to select the value.

Options: Auto (Default) / 128 Bytes / 256 Bytes / 512 Bytes / 1024 Bytes /

2048 Bytes / 4096 Bytes

Maximum Read Request

This item sets Maximum Read Request Size of PCI Express Device or allows

System BIOS to select the value.

Options: Auto (Default) / 128 Bytes / 256 Bytes / 512 Bytes / 1024 Bytes /

2048 Bytes / 4096 Bytes

ASPM Support

This item sets the ASPM Level: Force LO – Force all links to LO State;

Auto – BIOS auto configures; Disabled – Disables ASPM.

Options: Disabled (Default) / Auto / Force L0s

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

ACPI Settings/ WakeUp Event control

EuP Control

When EuP is enabled, the system will meet EuP requirement. All wake up

events do not work except Power Button after power down system (S5).

Options: Disabled (Default) / Enabled

PME Wake up from S5

The item enables the system to wake from S5 using PME event.

Options: Disabled (Default) / Enabled

Wake system with Fixed Time

This item enables or disables the system to wake on by alarm event. When

this item is enabled, the system will wake on the hr::min::sec specified.

Options: Disabled (Default) / Enabled

Wake up date

You can choose which date the system will boot up.

Wake up hour / Wake up minute / Wake up second

You can choose the system boot up time, input hour, minute and

second to specify.

Ring-In Wake up from S5

This item enables the system to wake from S5 using Ring-In event.

Options: Disabled (Default) / Enabled

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

CPU Configuration

This item shows CPU Information

Power Now

This item allows you to enable or disable the PowerNow power saving

technology.

Options: Enabled (Default) / Disabled

NX Mode

This item allows you to enable or disable No-execute page protection

Function

Options: Enabled (Default) / Disabled

SVM

This item allows you to enable AMD virtualization in CPU.

Options: Enabled (Default) / Disabled

CPB Mode

This item allows you to enable or disable CPB.

Options: Auto (Default) / Disabled

C6 Mode

This item allows you to enable or disable C6.

Options: Enabled (Default) / Disabled

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

Core Leveling

Change the number of compute unit in the system

Options: Auto (Default) / Manual

Note: The following items appear only when you set the Core Leveling item to

[Manual]

Compute Unit0/1

The item allows you to enable or disable CPU Computer Unit0/1.

Options: Enabled (Default) / Disabled

HTC temperature limit

This item allows you to set HTC temperature limit. Range: 70℃- 85℃

Options: 70℃(Default)

SATA Configuration

The BIOS will automatically detect the presence of SATA devices. There is a

sub-menu for each SATA device. Select a device and press <Enter> to enter

the sub-menu for detailed options.

OnChip SATA Channel

This item allows you to enable or disable OnChip SATA Channel

Options: Enabled (Default) / Disabled

OnChip SATA Type

This item allows you to set OnChip SATA type.

Options: Native IDE (Default) / RAID / AHCI / Legacy IDE

A55MD2 / A55MG2 / A55ML2 UEFI BIOS Manual

USB Configuration

Legacy USB Support

This item determines if the BIOS should provide legacy support for USB

devices like the keyboard, mouse, and USB drive. This is a useful feature

when using such USB devices with operating systems that do not natively

support USB (e.g. Microsoft DOS or Windows NT).

Options: Enabled (Default) / Disabled / Auto

EHCI Hand-Off

This is a workaround for OSes without EHCI hand-off support. The EHCI

ownership change should be claimed by EHCI driver.

Options: Disabled (Default) / Enabled

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