Biostar B250GTN User manual

BIOS Update ������������������������������������������������������������������������������������� 2
UEFI BIOS Setup �������������������������������������������������������������������������������� 6
1� Main Menu ����������������������������������������������������������������������������������� 7
2� Advanced Menu���������������������������������������������������������������������������� 8
3� Chipset Menu�������������������������������������������������������������������������������18
4� Boot Menu�����������������������������������������������������������������������������������22
5� Security Menu������������������������������������������������������������������������������25
6� O�N�E Menu����������������������������������������������������������������������������������28
7� Exit Menu�������������������������������������������������������������������������������������37
BIOS User Guide
Z270GTN / B250GTN

2 | BIOS Update
BIOS Update
The BIOS can be updated using either of the following ulies:
• BIOSTAR BIOS-FLASHER: Using this ulity, the BIOS can be updated from a le on a hard disk,
a USB drive (a ash drive or a USB hard drive), or a CD-ROM.
• BIOSTAR BIOS Update Ulity: It enables automated updang while in the Windows
environment. Using this ulity, the BIOS can be updated from a le on a hard disk, a USB
drive (a ash drive or a USB hard drive), or a CD-ROM, or from the le locaon on the Web.
BIOSTAR BIOS-FLASHER
Note
» This ulity only allows storage device with FAT32/16 format and single paron.
» Shung down or reseng the system while updang the BIOS will lead to system boot failure.
Updang BIOS with BIOSTAR BIOS-FLASHER
1. Go to the website to download the latest BIOS le for the motherboard.
2. Then, copy and save the BIOS le into a USB ash (pen) drive.(Only supported FAT/FAT32
format)
3. Insert the USB pen drive that contains the BIOS le to the USB port.
4. Power on or reset the computer and then press <F12> during the POST process.
5. Aer entering the POST screen, the BIOS-
FLASHER ulity pops out. Choose <fs0> to search
for the BIOS le.
6. Select the proper BIOS le, and a message asking
if you are sure to ash the BIOS le. Click “Yes” to
start updang BIOS.

BIOS Update | 3
Z270GTN / B250GTN
7. A dialog pops out aer BIOS ash is completed,
asking you to restart the system. Press the <Y> key
to restart system.
8. While the system boots up and the full screen logo shows up, press <DEL> key to enter BIOS
setup.
Aer entering the BIOS setup, please go to the <Save & Exit>, using the <Restore Defaults>
funcon to load Opmized Defaults, and select <Save Changes and Reset> to restart the
computer. Then the BIOS Update is completed.
BIOS Update Ulity (through the Internet)
1. Installing BIOS Update Ulity from the DVD Driver.
2. Please make sure the system is connected to the internet before using this funcon.
3. Launch BIOS Update Ulity and click the
“Online Update” buon on the main screen.
4. An open dialog will show up to request your
agreement to start the BIOS update. Click “Yes”
to start the online update procedure.
5. If there is a new BIOS version, the ulity will
ask you to download it. Click “Yes” to proceed.
6. Aer the download is completed, you will be
asked to program (update) the BIOS or not. Click
“Yes” to proceed.

4 | BIOS Update
7. Aer the updang process is nished, you
will be asked you to reboot the system. Click
“OK” to reboot.
8. While the system boots up and the full screen logo shows up, press <DEL> key to enter BIOS
setup.
Aer entering the BIOS setup, please go to the <Save & Exit>, using the <Restore Defaults>
funcon to load Opmized Defaults, and select <Save Changes> and <Reset> to restart the
computer. Then, the BIOS Update is completed.
BIOS Update Ulity (through a BIOS le)
1. Installing BIOS Update Ulity from the DVD Driver.
2. Download the proper BIOS from hp://www.biostar.com.tw/
3. Launch BIOS Update Ulity and click the “Update
BIOS” buon on the main screen.
4. A warning message will show up to request your
agreement to start the BIOS update. Click “OK” to
start the update procedure.
5. Choose the locaon for your BIOS le in the
system. Please select the proper BIOS le, and
then click on “Open”. It will take several minutes,
please be paent.

UEFI BIOS Setup | 5
Z270GTN / B250GTN
6. Aer the BIOS Update process is nished, click
on “OK” to reboot the system.
7. While the system boots up and the full screen logo shows up, press <DEL> key to enter BIOS
setup.
Aer entering the BIOS setup, please go to the <Save & Exit>, using the <Restore Defaults>
funcon to load Opmized Defaults, and select <Save Changes and Reset> to restart the
computer. Then, the BIOS Update is completed.
Backup BIOS
Click the Backup BIOS buon on the main screen
for the backup of BIOS, and select a proper
locaon for your backup BIOS le in the system,
and click “Save”.

6 | UEFI BIOS Setup
UEFI BIOS Setup
Introduction
The purpose of this manual is to describe the sengs in the AMI UEFI BIOS Setup program on this
motherboard. The Setup program allows users to modify the basic system conguraon and save
these sengs 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 acvates at the rst stage of the boong process, loading and execung the
operang system. Some addional features, such as virus and password protecon or chipset
ne-tuning opons are also included in UEFI BIOS.
The rest of this manual will to guide you through the opons and sengs in UEFI BIOS Setup.
Plug and Play Support
This AMI UEFI BIOS supports the Plug and Play Version 1.0A specicaon.
EPA Green PC Support
This AMI UEFI BIOS supports Version 1.03 of the EPA Green PC specicaon.
ACPI Support
AMI ACPI UEFI BIOS support Version 1.0/2.0 of Advanced Conguraon and Power interface
specicaon (ACPI). It provides ASL code for power management and device conguraon
capabilies as dened in the ACPI specicaon, developed by Microso, Intel and Toshiba.
PCI Bus Support
This AMI UEFI BIOS also supports Version 2.3 of the Intel PCI (Peripheral Component Interconnect)
local bus specicaon.
Using Setup
When starng up the computer, press <Del> during the Power-On Self-Test (POST) to enter the
UEFI BIOS setup ulity.
In the UEFI BIOS setup ulity, you will see General Help descripon at the top right corner, and
this is providing a brief descripon of the selected item. Navigaon Keys for that parcular menu
are at the boom right corner, and you can use these keys to select item and change the sengs.
Note
»The default UEFI BIOS sengs apply for most condions to ensure opmum performance of the
motherboard. If the system becomes unstable aer changing any sengs, please load the default
sengs to ensure system’s compability and stability. Use Load Setup Default under the Exit Menu.
»For beer system performance, the UEFI BIOS rmware is being connuously updated. The UEFI BIOS
informaon described in this manual is for your reference only. The actual UEFI BIOS informaon and
sengs on board may be slightly dierent from this manual.
»The content of this manual is subject to be changed without noce. We will not be responsible for any
mistakes found in this user’s manual and any system damage that may be caused by wrong-sengs.

1. Main Menu | 7
Z270GTN / B250GTN
1� Main Menu
Once you enter AMI UEFI BIOS Setup Ulity, the Main Menu will appear on the screen providing
an overview of the basic system informaon.
BIOS Information
It shows system informaon including UEFI BIOS version, Project Code, Model Name, Build Date
and etc.
Total Memory
Shows system memory size, VGA shard memory will be excluded.
Memory Frequency
Shows the system memory frequency.
System Language
Choose the system default language.
System Date
Set the system date. Note that the ‘Day’ automacally changes when you set the date.
System Time
Set the system internal clock.

8 | 2. Advanced Menu
2� Advanced Menu
The Advanced Menu allows you to congure the sengs of CPU, Super I/O, and other system
devices.
Note
»Beware of that seng inappropriate values in items of this menu may cause system to malfuncon.
ACPI Settings
Enable ACPI Auto Conguraon
This item enables or disables BIOS ACPI auto conguraon funcon.
Opons: Disabled (Default) / Enabled

2. Advanced Menu | 9
Z270GTN / B250GTN
Enable Hibernaon
This item enables or disables system ability to hibernate (0S/S4 sleep state). This opon may not
be eecve with some 0Ss.
Opons: Enabled (Default) / Disabled
ACPI Sleep State
This item selects the highest ACPI sleep state the system will enter when the SUSPEND buon is
pressed.
Opons: S3 (Suspend to RAM) (Default) / Suspend Disabled
Lock Legacy Resources
The item enables or disables Lock of Legacy Resources.
Opons: Disabled (Default) / Enabled
S3 Video Repost
The item enables or disables S3 Video Repost. On enabling, Video Opon ROM will be dispatched
during S3 resume.
Opons: Disabled (Default) / Enabled
PS2 Keyboard PowerOn
This item allows you to control the keyboard power on funcon.
Opons: Disabled (Default) / Any Key / Stroke Key / Specic Key
Stroke Keys
This item will show only when Keyboard PowerOn is set “Stroke Key.”
Opons: Wake Key (Default) / Power Key / Ctrl+F1 / Ctrl+F2 / Ctrl+F3 / Ctrl +F4 / Ctrl+F5 / Ctrl+F6
Specic Key
This item will show only when Keyboard PowerOn is set “Specic Key.” Press Enter to set Specic
key.
PS2 Mouse PowerOn
This item allows you to control the mouse power on funcon.
Opons: Disabled (Default) / Enabled
Restore AC Power Loss
Specify what state to go to when power is re-applied aer a power failure.
Opons: Power O (Default) / Power On / Last State
PME Wake up from S5
The item enables the system to wake from S5 using PME event.
Opons: Disabled (Default) / Enabled
Wake system with Fixed Time
This item enables or disables the system to wake on alarm event. When this item is enabled, the
system will wake on the hr::min::sec specied.
Opons: 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 me, input hour, minute and second to specify.

10 | 2. Advanced Menu
SMART FAN Control
CPU Smart FAN1 & System Smart FAN1
This item allows you to control the CPU/System Smart Fan funcon.
Opons: Disabled (Default) / Auto
Note
»The following items appear only when you set the Smart Fan funcon to [Auto].
CPU Fan Calibrate
Press [ENTER] to calibrate CPU Fan speed.
Control Mode
This item provides several operaon modes of the fan.
Opons: Manual / Quiet / Aggressive
Fan Ctrl OFF(°C)
When CPU temperature is lower than this value, the CPU fan will keep lowest RPM.
Opons: 10 (°C) (default)
Fan Ctrl On(°C)
When CPU temperature is higher than this value, the CPU fan controller will turn on.
Opons: 20 (°C) (Default)
Fan Ctrl Start Value
This item sets CPU FAN Start Speed Value.
Opons: 50 (Default)
Fan Ctrl Sensive
Themuneral is bigger, the Fan speed is higher.
Opons: 30 (Default)

2. Advanced Menu | 11
Z270GTN / B250GTN
IT8613 Super IO Configuration
H/W Monitor
Shutdown Temperature
This item allows you to set up the CPU shutdown Temperature.
Opons: Disabled (Default) / 70°C/158°F / 75°C/167°F / 80°C/176°F / 85°C/185°F / 90°C/194°F

12 | 2. Advanced Menu
Network Stack Configuration
Network Stack
This item enables or disables UEFI Network stack
Opons: Disabled (Default) / Enabled
Note
»The following items appear only when you set the Network Stack funcon to [Enabled]
IPv4 PXE Support
This item enables or disables IPv4 PXE Boot Support. If disabled IPv4 PXE boot opon will not be
created.
Opons: Disabled (Default) / Enabled
IPv4 HTTP Support
This item enables or disables IPv4 HTTP Boot Support. If disabled IPV4 HTTP boot opon will not
be created.
Opons: Disabled (Default) / Enabled
IPv6 PXE Support
This item enables or disables IPv6 PXE Boot Support. If disabled IPv6 PXE boot opon will not be
created.
Opons: Disabled (Default) / Enabled
IPv6 HTTP Support
This item enables or disables IPv6 HTTP Boot Support. If disabled IPv6 HTTP boot opon will not
be created.
Opons: Disabled (Default) / Enabled
PXE boot wait me
Wait me to press ESC key to abort the PXE boot.
Media detect count
Number of mes presence of media will be checked.

2. Advanced Menu | 13
Z270GTN / B250GTN
NVMe Configuration
The item shows NVMe controller and driver informaon.
Offboard PCIe SATA Controller

14 | 2. Advanced Menu
USB Configuration
Legacy USB Support
The item allows you to enable Legacy USB support. AUTO opon disables legacy support if no USB
devices are connected. DISABLE opon will keep USB devices available only for EFI applicaons.
Opons: Enabled (Default) / Disabled / Auto
XHCI Hand-o
This is a workaround for OSes without XHCI hand-o support. The XHCI ownership change should
be claimed by XHCI driver.
Opons: Disabled (Default) / Enabled
USB Mass Storage Driver Support
The item allows you to enable or disable USB Mass Storage Driver Support.
Opons: Enabled (Default) / Disabled
Port 60/64 Emulaon
The item allows you to enable or disable I/O port 60h/64h emulaon support. This should be
enabled for the complete USB keyboard legacy support for non-USB aware OSes.
Opons: Enabled (Default) / Disabled
USB transfer me-out
The me-out value for Control, Bulk, and Interrupt transfers.
Opons: 20 sec (Default) / 1 sec / 5 sec / 10 sec
Device reset me-out
The item sets USB mass storage device Start Unit command me-out.
Opons: 20 sec (Default) / 10 sec / 30 sec / 40 sec

2. Advanced Menu | 15
Z270GTN / B250GTN
Device power-up delay
Maximum me the device will take before it properly reports itself to the Host Controller.
“Auto” uses default value: for a Root port it is 100ms, for a Hub port the delay is taken from Hub
descriptor.
Opons: Auto (Default) / Manual
Note
»The following items appear only when you set the Device power-up delay funcon to [Manual].
Device power-up delay in seconds
Delay range is 1 ~ 40 seconds, in one second increments.
Opons: 5 (Default)
USB FLASH DRIVE PMAP
This item Mass storage device emulaon type. ‘AUTO‘ enumerates devices according to their
media format. Opcal drives are emulated as ‘CDROM’ , drives with no media will be emulated
according to a drive type.
Opons: Auto (Default) / Floppy / Forced FDD / Hard Disk / CD-ROM
CPU Configuration
This item shows CPU Informaon
C6DRAM
This item enables or disables moving of DRAM contents to PRM memory when CPU is in C6 state.
Opons: Disabled (Default) / Enabled
Overclocking Lock
This item enables or disables Overclocking Lock (BIT 20) in FLEX_RATIO(194) MSR.
Opons: Disabled (Default) / Enabled
Hardware Prefetcher
This item to turn on / o the MLC streamer prefetcher.
Opons: Enabled (Default) / Disabled

16 | 2. Advanced Menu
Adjacent Cache Line Prefetch
This item to turn on / o prefetching of adjacent cache lines.
Opons: Enabled (Default) / Disabled
Intel (VMX) Virtualizaon Technology
The item allows you to enable or disable Intel (VMX) Virtualizaon Technology, when enabled, a
VMM can ulize the addional hardware capabilies provided by Vanderpool Technology.
Opons: Enabled (Default) / Disabled
Acve Processor Cores
This item allows you to set up number of cores to enable in each processor package.
Opons: All (Default) / 1
Hyper-Threading
This item allows you to set up Hyper-Threading. Enabled for Windows XP and Linux (OS opmized
for Hyper-Threading Technology), Disabled for other OS (OS not opmized for Hyper-Threading
Technology)..
Opons: Enabled (Default) / Disabled
AES
This item enables or disables AES (Advanced Encrypon Standard).
Opons: Enabled (Default) / Disabled
SATA and Rst Configuration
The BIOS will automacally 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 opons.
SATA Controller(s)
This item enables/disables Serial ATA Device.
Options: Enabled (Default) / Disabled
SATA Mode Selecon
This item determines how SATA controller(s) operate.
Options: AHCI (Default) / Intel RST With Intel Optane System Acceleration

2. Advanced Menu | 17
Z270GTN / B250GTN
SMART Self Test
This item runs SMART Self Test on all HDDs during POST.
Options: Disabled (Default) / Enabled
SATA Hot Plug
This item Designates SATA port as Hot Pluggable.
Options: Disabled (Default) / Enabled

18 | 3. Chipset Menu
3� Chipset Menu
This secon describes conguring the PCI bus system. PCI, or Personal Computer Interconnect, is
a system which allows I/O devices to operate at speeds nearing the speed of the CPU itself uses
when communicang with its own special components.
Note
»Beware of that seng inappropriate values in items of this menu may cause system to malfuncon.
Onboard Device
Onboard LAN1
This item enables/disables Onbaord LAN1.
Opons: Enabled (Default) / Disabled

3. Chipset Menu | 19
Z270GTN / B250GTN
Onboard LAN1 Opon ROM
This item enables/disables Onboard LAN1 Opon ROM.
Opons: Disabled (Default) / Enabled
PCH-IO Configuration
PCI Express Conguraon
HD Audio
Control Detecon of the HD-Audio device. Disabled = HDA will be uncondionally disabled.
Enabled = HDA will be uncondionally enabled. Auto = HDA will be enabled if present, disabled
otherwise.
Opons: Auto (Default) / Disabled / Enabled

20 | 3. Chipset Menu
EuP Control
When EuP is enabled, the system will meet EuP requirement.
Opons: Disabled (Default) / Enabled in S4-S5
System Agent (SA) Configuration
Internal Graphics
This item keeps IGFX enabled based on the setup opons.
Opons: Auto (Default) / Enabled / Disabled
Primary Display
This item selects which of IGFX/PEG/PCI Graphics device should be Primary Display or select SG
for Switchable Gfx.
Opons: Auto (Default) / IGFX / PEG / PCI / SG
GTT Size
This item select the GTT Size.
Opons: 8MB (Default) / 2MB / 4MB
Aperture Size
This item selects Aperature Size. Note : Above 4GB MMIO BIOS assignment is automacally
enabled when selecng 2048MB aperture. To use this feature, please disable CSM Support.
Opons: 256MB (Default) / 128MB / 512MB / 1024MB / 2048MB / 4096MB
DVMT Pre-Allocated
This item selects DVMT 5.0 Pre-Allocated (Fixed) Graphics Memory size used by the Internal
Graphics Device.
Opons: 32M (Default) / 0M / 64M / 4M / 8M / 12M / 16M / 20M / 24M / 28M / 32M/F7 / 36M
/ 40M / 44M / 48M / 52M / 56M / 60M
DVMT Total Gfx Mem
This item selects DVMT5.0 Total Graphic Memory size used by the Internal Graphics Device.
Opons: 256M (Default) / 128M / MAX