Biostar A55MLV2 User manual

A55MLC2/A55MLV2/A55MGC UEFI BIOS Manual
i
UEFI BIOS Setup...................................................................................... 1
1 Main Menu ............................................................................................. 3
2 Advanced Menu...................................................................................... 4
3 Chipset Menu ....................................................................................... 14
4 Boot Menu............................................................................................. 21
5 Security Menu ...................................................................................... 23
6 Performance Menu .............................................................................. 24
7 Exit Menu ............................................................................................. 32

A55MLC2/A55MLV2/A55MGC 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 devices s uch as keyboard,
mouse, serial ports and disk drives. BIOS activates at the first stage o f the booting
process, loading and executing the operating s ystem. Some additio nal features, s uch
as virus and pass word protection or chips et fine-tuning op tions are also inc luded 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 Vers ion 1.0A specification.
EPA Green PC Support
This AMI UEFI BIOS s upports Vers ion 1.03 of the EPA Green PC spec ification.
ACPI Support
AMI ACP I UEFI BIOS s uppo rt Versio n 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 s uppo rts 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.

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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 thes e keys to s elect item and change the
settings.
Notice
The default UEFI BIOS settings apply for most conditions to ens ure 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.

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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 system internal cloc k.

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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
Beware 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 multiple option ROMs (Legacy and EFI Compatible), this item spec ifies
what PCI Option ROM to launch
Options: Legacy ROM (Default) / EFI Compatible ROM
PCI Latency Timer
This item s ets 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 C locks / 224 PCI Bus
Clocks / 248 PCI Bus Cloc ks
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 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 co nfigures; Disabled – Disables ASPM.
Options: Disabled (Default) / Auto / Force L0s
ACPI Settings/WakeUp Event control
EuP Control
When EuP is enabled, the system will meet EuP requirement.
Options: Dis abled (Default) / Enabled
PME Wake up from S5
The item enables the s ystem to wake from S5 using PME event.
Options: Disabled (Default) / Enabled

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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.
CPU Configuration
Limit CP UID 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

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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 secure 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
HTC temperature limit
This item allows you to set HTC temperature limit. Range: 70℃ - 95℃
Options: 80℃(Default)
CPU Information
This item shows CPU Information

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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.
.
SMART FAN Control
CPU Smart FAN
This item allows you to control the CPU Smart Fan function.
Options: Disabled (Default) / Auto

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CPU FAN Calibrate
Press [ENTER] to calibrate CPU FAN.
Control Mode
This item provides several operation modes of the fan.
Options: Quiet / Aggressive / Manual
Fan Ctrl OFF(℃)
When CPU temperature is lower than this value, the CPU fan will keep lo west RPM.
Options: 10 (℃) (default)
Fan Ctrl On(℃)
When CPU temperature is higher than this value, the CPU fan controller will turn on.
Options: 20 (℃) (Default)
Fan Ctrl Start Value
This item sets CPU FAN Start Speed Value.
Options: 50 (Default)
Fan Ctrl Sensitive
The bigger the numeral is, the higher the FAN speed is.
Options: 30 (Default)

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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
Mass Storage Devices:
Mass storage device emulation type ‘Auto’ enumerates devices according to their
media format. Optical drives are emulated as ‘CDROM’, drives with no media will
be emulated according to a drive typ e.
Options: Auto (Default) / Floppy / Forced FDD / Hard Disk / CD-ROM

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Super IO Configuration
Restore AC Power Loss
This setting specifies how your system should behave after a power fail or interrupts
occurs. Power Off: Leaving the system in power-off status after power recovers.
Power ON: Powering on the system immediately when power returns. Last State: 1.
Leaving the system in power-off if the system shuts down at DC off status; 2.
Powering on the system immediately if the system shuts down at DC on status.
Options: Power Off (Default) / Power On / Last State
Serial Port 1 Configuration

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Serial Port
This item enables or dis ables Serial Port (COM).
Options: Enabled (Default) / Disabled
Change Settings
This item s elects an optimal setting for Super IO device.
Optio ns: Auto (Default) / IO=3F8h; IRQ=4 / IO=3F8h; IRQ=3, 4, 5, 6, 7, 10, 11,
12 / IO=2F8h; IRQ=3, 4, 5, 6, 7, 10, 11, 12 / IO=3E8h; IRQ=3, 4, 5, 6, 7, 10, 11, 12 /
IO=2E8h; IRQ=3, 4, 5, 6, 7, 10, 11, 12
H/W Monitor
PWM Processor Hot
This item allows you to set up the PWM processor hot function.
Options: Enabled (Default) / Disabled
Shutdown Temperature
This item allows you to set up the CPU shutdown Temperature.
Options: Disabled (Default) / 70 /158 / 75 /167 / 80 /176 /℃℉ ℃℉ ℃℉
85 /185 / 90 /194℃℉℃℉

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3 Chipset Menu
This section describes configuring the PCI bus system. PCI, or Personal Computer
Interconnect, is a system whic h allows I/O devices to operate at speeds nearing the
speed of the CPU itself uses when communicating with its own special components.
Notice
Beware of that setting inappropriate values in items of this menu may cause system
to malfunction.
Onboard Devices

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Onboard LAN Option ROM
This item enables/disables Onboard LAN Option ROM.
Options: Disabled (Default) / Enabled
Launch Storage OpROM
This item enables/disables Boot Option for Legacy Mass Storage Devices with
Option ROM.
Options: Enabled (Default) / Disabled
Realtek PCIE NIC
This item enables/disables Realtek PCIE NIC.
Options: Enabled (Default) / Disabled
North Bridge
Primary Video Device
This item allows you to select Primary Video Device that BIOS will use to for
output.
Options: IGD Video (Default) / NB PCIe slot Video
Surround View
It support multi-display function recommend video output connect with IGD first
Options: Disabled (Default) / Enabled

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FB Location
This item allows you to select FB location.
Options: Above 4G (Default) / Below 4G
GFX Configuration
PSPP Policy
This item allows you to set PCIe speed power policy.
Options: Balanced-High (Default) / Disabled / Performance / Balanced-Low /
Power Saving
GFX HD Audio controller
This item allows you to enable or disable GFX HD Audio controller.
Options: Enabled (Default) / Disabled
Integrated Graphics
This item set integrated graphics controller.
Options: Auto (Default) / Dis abled / Force
Memory Hole Remapping
This item allows you to enable or disable the remapping of the overlapped PCI
memory above the total physical memory. Only 64-bit OS supports this function.
Options: Enabled (Default) / Disabled

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Bank Interleaving
Bank Interleaving is an advanced chipset tec hnique us ed to improve memory
perfo rmance. Memory interleaving increases bandwidth by allowing simultaneous
access to more than one piece of memory.
Options: Enabled (Default) / Disabled
Cha nnel Interleaving
This item allows you to control the DDR3 dual-channel function.
Options: Enabled (Default) / Disabled
South Bridge Configuration
SB SATA Configuration

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OnChip SATA Channel
This option allows you to enable the on-chip Serial ATA.
Options: Enabled (Default) / Disabled
OnChip SATA Type
This option allows you to s elect the on-chip Serial ATA operation mode.
Options: Native IDE (Default) / RAID / AHCI / Legacy IDE
SB USB Configuration
OHCI HC (Bus 0 Dev 18/19/22/20 Fn 0/5)
This item allows you to control OHCI host controller. (USB 1.1 Device)
Options: Enabled (Default) / Disabled
EHCI HC (Bus 0 Dev 18/19/22 Fn 2)
This item allows you to control EHCI hos t controller. (USB 2.0 Device)
Options: Enabled (Default) / Disabled
SB GPP Port Configuration

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GPP Link ASPM
Options: Disabled (Default) / L0s / L1 / L0s+L1
GPP Gen2
Options: Enabled (Default) / Disabled
UMI Gen2
Options: Enabled (Default) / Disabled
GPP HW Compliance Mode
Options: Disabled (Default) / Port A / Port B / Port C / Port D
SB GPP LANE REVERSAL
Options: Disabled (Default) / Enabled