Biostar A75MH User guide

A75MH / A55MH UEFI BIOS Manual
i
UEFI BIOS Setup...................................................................................... 1
1 Main Menu ............................................................................................. 3
2 Advanced Menu...................................................................................... 4
3 Chipset Menu ....................................................................................... 17
4 Boot Menu............................................................................................. 25
5 Security Menu ...................................................................................... 27
6 Performance Menu .............................................................................. 28
7 Exit Menu ............................................................................................. 36

A75MH / A55MH UEFI BIOS Manual
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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 sys tem controls most of the input and output devic es s uch as keyboard,
mouse, s erial ports and dis k drives. BIOS activates at the firs t stage of the booting
process, lo ading and executing the op erating system. Some add itional features, s uch
as virus and pass word protection or chips et fine-tuning optio ns are also includ ed 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 UEF I BIOS supports the Plug and Play Vers ion 1.0A spec ification.
EPA Green PC Support
This AMI UEFI BIOS s upports Vers ion 1.03 of the EPA Green PC specification.
ACPI Support
AMI ACPI UEFI BIOS support Vers io n 1.0/2.0 of Ad vanced 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 s uppo rts Version 2.3 of the Intel PC I (Peripheral
Component Interconnect) local bus specification.
DRAM Support
DDR3 SDRAM (Double Data Rate III Synchronous DRAM) is supported.

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Supported CPUs
This AMI UEFI BIOS supports AMD 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
zThe 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 s ystem’s compatibility and
stability. Use Load Setup Default under the Exit Menu.
zFor better system performance, the UEFI BIOS firmware is being continuously
updated. The UEFI BIOS information d escribed in this manual is fo r yo ur reference
only. The actual UEFI BIOS information and settings on board may be slightly
different from this manual.
zThe content of this manual is subject to be changed without notice. We will not be
responsib le fo r any mistakes found in this user’s manual and any s ystem damage that
may be c aused by wro ng-s ettings.

A75MH / A55MH UEFI BIOS Manual
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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
Shows system information including UEFI BIOS version, Project Code, Model
Name, Build Date, etc.
Total Memor y
Shows system memory size, VGA shard memory will be excluded.
System Date
Set the system date. Note that the ‘Day’ automatically changes when you set the
date.
System Time
Set the s ystem internal clock.

A75MH / A55MH UEFI BIOS Manual
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2 Advanced Menu
The Advanced Menu allows you to configure the settings of CPU, Super I/O, Power
Management, and other system devices.
Notice
zBeware of that setting inappropriate values in items of this menu may cause
system to malfunction.
PCI Su bs ystem Settings

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PCI ROM Priority
In case of multip le option ROMs (Legacy and EFI Compatible), this item specifies
what PCI Option ROM to launc h
Options: Legacy ROM (Default) / EFI Compatible ROM
PCI Latency Timer
This item sets the value to be programmed into PCI Latency Timer Register.
Options: 32 P CI 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

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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 s elec t 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 co nfigures; Dis abled – Disab les ASPM.
Options: Disabled (Default) / Auto / Force L0s
ACPI Settings/WakeUp Event control
ACPI Sleep State
This item selects the highest ACPI sleep state the system will enter when the
SUSPEND button is pressed.
Options: S3 (Suspend to RAM) (Default) / Suspend Disabled

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S3 Video Repost
This item allows you to enable or disable S3 Video Repost.
Options: Disabled (Default) / Enabled
EuP Control
When EuP is enabled, the system will meet EuP requirement.
Options: Disabled (Default) / Enabled
PME Wake up from S5
The item enables the s ystem 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. W hen 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, inp ut ho ur, minute and second to sp ecify.
Ring-In Wake up from S5
This item enables the system to wake from S5 using Ring-In event.
Options: Disabled (Default) / Enabled
PS2 Keyboard PowerOn
This item allows you to control the keyboard power on function.
Options: Disabled (Default) / Any Key / Stroke Key / Specific Key

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Stroke Keys Selected
This item will show only when Keyboard PowerOn is set “Stroke Key.”
Options: Wake Key (Default) / Power Key / Ctrl+F1 / Ctrl+F2 / Ctrl+F 3 /
Ctrl +F4 / Ctrl+F5 / Ctrl+F6
Specific Key Enter
This item will show only when Keybo ard PowerOn is set “Specific Key.” Press
Enter to set Specific key.
PS2 Mouse PowerOn
This item allows you to control the mouse power on function.
Options: Disabled (Default) / Enabled
USB Device Wakeup from S3/S4
This item allows you to enable o r d is abled the USB res ume from S3/S4 function.
Options: Disabled (Default) / Enabled
CPU Configuration

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Limit CPUID Maximum
When the computer is booted up, the operating system executes the CPUID
instruction to identify the processor and its capabilities. Before it c an do so, it must
first query the processor to find out the highest input value CPUID recognizes. This
determines the kind of basic information CPUID can provide the operating system.
Options: Disabled (Default) / Enabled
C6 Mode
This item allows you to enable or disable C6.
Options: Enabled (Default) / Disabled
CPB Mode
This item allows you to enable or disable CPB.
Options: Auto (Default) / Disabled
AMD PowerNow function
This item allows you to enable or disable the PowerNow power saving technology.
Options: Enabled (Default) / Disabled
SVM
This item allows you to enable AMD virtualization in CPU. This s ecure virtual mode
will let your run multiple OS (guest) on the same physical hardware by decoupling
OS and physical hardware with the hypervisor layer.
Options: Enabled (Default) / Disabled