Asus Z270-WS User Manual
Z270-WS
BIOS Manual
Motherboard
E12591
First Edition
April 2017
Copyright© 2017 ASUSTeK COMPUTER INC. All Rights Reserved.
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ASUS Z270-WS BIOS Manual
Contents
1.1 Knowing BIOS ............................................................................................... 4
1.2 BIOS setup program ..................................................................................... 5
1.2.1 EZ Mode......................................................................................... 6
1.2.2 Advanced Mode ............................................................................. 7
1.2.3 Q-Fan Control .............................................................................. 10
1.2.4 EZ Tuning Wizard ........................................................................ 12
1.3 My Favorites ................................................................................................ 15
1.4 Main menu ................................................................................................... 17
1.5 Ai Tweaker menu ......................................................................................... 19
1.6 Advanced menu .......................................................................................... 37
1.6.1 CPU Conguration ....................................................................... 38
1.6.2 Platform Misc Conguration ......................................................... 41
1.6.3 System Agent (SA) Conguration ................................................ 42
1.6.4 PCH Conguration ....................................................................... 43
1.6.5 PCH Storage Conguration.......................................................... 44
1.6.6 PCH-FW Conguration ................................................................ 45
1.6.7 Thunderbolt(TM) Conguration .................................................... 46
1.6.8 Onboard Devices Conguration ................................................... 46
1.6.9 APM Conguration ....................................................................... 49
1.6.10 Network Stack Conguration........................................................ 50
1.6.11 HDD/SSD SMART Information .................................................... 50
1.6.12 USB Conguration ....................................................................... 51
1.7 Monitor menu .............................................................................................. 52
1.8 Boot menu ................................................................................................... 60
1.9 Tool menu .................................................................................................... 65
1.9.1 ASUS EZ Flash 3 Utility ............................................................... 65
1.9.2 Secure Erase ............................................................................... 66
1.9.3 ASUS Overclocking Prole .......................................................... 67
1.9.4 ASUS SPD Information ................................................................ 68
1.9.5 Graphics Card Information ........................................................... 68
1.10 Exit menu ..................................................................................................... 69
1.11 Updating BIOS ............................................................................................. 70
1.11.1 EZ Update .................................................................................... 70
1.11.2 ASUS EZ Flash 3 ......................................................................... 71
1.11.3 ASUS CrashFree BIOS 3 ............................................................. 73
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3
BIOS Setup
1.1 Knowing BIOS
The new ASUS UEFI BIOS is a Unied Extensible Interface that complies with UEFI
architecture, offering a user-friendly interface that goes beyond the traditional keyboard-
only BIOS controls to enable a more exible and convenient mouse input. You can easily
navigate the new UEFI BIOS with the same smoothness as your operating system. The
term “BIOS” in this user manual refers to “UEFI BIOS” unless otherwise specied.
BIOS (Basic Input and Output System) stores system hardware settings such as storage
device conguration, overclocking settings, advanced power management, and boot
device conguration that are needed for system startup in the motherboard CMOS. In
normal circumstances, the default BIOS settings apply to most conditions to ensure
optimal performance. DO NOT change the default BIOS settings except in the following
circumstances:
• An error message appears on the screen during the system bootup and requests you
to run the BIOS Setup.
• You have installed a new system component that requires further BIOS settings or
update.
Inappropriate BIOS settings may result to instability or boot failure. We strongly
recommend that you change the BIOS settings only with the help of a trained service
personnel.
• When downloading or updating the BIOS le, rename it as Z270WS.CAP for these
motherboards.
• BIOS settings and options may vary due to different BIOS release versions. Please
refer to the latest BIOS version for settings and options.
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1.2 BIOS setup program
Use the BIOS Setup to update the BIOS or congure its parameters. The BIOS screen
include navigation keys and brief onscreen help to guide you in using the BIOS Setup
program.
Entering BIOS at startup
To enter BIOS Setup at startup, press <Delete> or <F2> during the Power-On Self Test
(POST). If you do not press <Delete> or <F2>, POST continues with its routines.
Entering BIOS Setup after POST
To enter BIOS Setup after POST:
• Press <Ctrl>+<Alt>+<Delete> simultaneously.
• Press the reset button on the system chassis.
• Press the power button to turn the system off then back on. Do this option only if you
failed to enter BIOS Setup using the rst two options.
After doing either of the three options, press <Delete> key to enter BIOS.
• The BIOS setup screens shown in this section are for reference purposes only, and
may not exactly match what you see on your screen.
• Ensure that a USB mouse is connected to your motherboard if you want to use the
mouse to control the BIOS setup program.
• If the system becomes unstable after changing any BIOS setting, load the default
settings to ensure system compatibility and stability. Select the Load Optimized
Defaults item under the Exit menu or press hotkey <F5>. See section 1.10 Exit
menu for details.
• If the system fails to boot after changing any BIOS setting, try to clear the CMOS and
reset the motherboard to the default value. See section 1.1.6 Onboard buttons and
switches in your user manual for information on how to erase the RTC RAM.
• The BIOS setup program does not support Bluetooth devices.
BIOS menu screen
The BIOS Setup program can be used under two modes: EZ Mode and Advanced Mode.
You can change modes from Setup Mode in Boot menu or by pressing the <F7> hotkey.
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1.2.1 EZ Mode
The EZ Mode provides you an overview of the basic system information, and allows you to
select the display language, system performance, mode and boot device priority. To access
the Advanced Mode, select Advanced Mode or press the <F7> hotkey for the advanced
BIOS settings.
The default screen for entering the BIOS setup program can be changed. Refer to the
Setup Mode item in section Boot menu for details.
Displays the system properties of the selected mode.
Displays the CPU/motherboard temperature,
CPU voltage output, CPU/chassis/power fan
speed, and SATA information
Selects the display language
of the BIOS setup program
Click < or > to switch EZ System Tuning modes
Creates storage RAID and
configures system overclocking
Enables or disables the SATA RAID mode
for Intel Rapid Storage Technology
Displays the CPU Fan’s speed. Click
the button to manually tune the fans
The boot device options vary depending on the devices you installed to the system.
6
Loads optimized
default settings
Saves the changes
and resets the system
Click to go to Advanced mode
Click to display boot devices
Selects the boot device priority
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Search on the FAQ
1.2.2 Advanced Mode
The Advanced Mode provides advanced options for experienced end-users to congure
the BIOS settings. The gure below shows an example of the Advanced Mode. Refer to the
following sections for the detailed congurations.
To switch from EZ Mode to Advanced Mode, click Advanced Mode(F7) or press the <F7>
hotkey.
Configuration fields
Menu bar
Language
Menu items
MyFavorite(F3)
General help
Q-fan Control(F6)
Last modified settings
EZ Tuning Wizard(F11)
Go back to EZ Mode
Displays the CPU temperature,
CPU, and memory voltage output
Scroll barPop-up Menu
Hot Keys
Search on the FAQ
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Menu bar
The menu bar on top of the screen has the following main items:
My Favorites
Main
Ai Tweaker
Advanced
Monitor
Boot
Tool
Exit
For saving the frequently-used system settings and conguration.
For changing the basic system conguration
For changing the overclocking settings
For changing the advanced system settings
For displaying the system temperature, power status, and changing the
fan settings.
For changing the system boot conguration
For conguring options for special functions
For selecting the exit options and loading default settings
Menu items
The highlighted item on the menu bar displays the specic items for that menu. For example,
selecting Main shows the Main menu items.
The other items (My Favorites, Ai Tweaker, Advanced, Monitor, Boot, Tool, and Exit) on the
menu bar have their respective menu items.
Submenu items
An arrow sign (>) before each item on any menu screen means that the item has a submenu.
To display the submenu, select the item and press <Enter>.
Language
This button above the menu bar contains the languages that you can select for your BIOS.
Click this button to select the language that you want to display in your BIOS screen.
My Favorites (F3)
This button above the menu bar shows all BIOS items in a Tree Map setup. Select frequentlyused BIOS settings and save it to MyFavorites menu.
Refer to section 1.3 My Favorites for more information.
Q-Fan Control (F6)
This button above the menu bar displays the current settings of your fans. Use this button to
manually tweak the fans to your desired settings.
Refer to section 1.2.3 Q-Fan Control for more information.
EZ Tuning Wizard (F11)
This button above the menu bar allows you to view and tweak the overclocking settings of
your system. It also allows you to change the motherboard’s SATA mode from AHCI to RAID
mode.
Refer to section 1.2.4 EZ Tuning Wizard for more information.
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Search on FAQ
Move your mouse over this button to show a QR code, scan this QR code on your mobile
device to connect to the BIOS FAQ web page of the ASUS support website. You can also
scan the following QR code:
Hot keys
This button above the menu bar contains the navigation keys for the BIOS setup program.
Use the navigation keys to select items in the menu and change the settings.
Scroll bar
A scroll bar appears on the right side of a menu screen when there are items that do not t
on the screen. Press the Up/Down arrow keys or <Page Up> / <Page Down> keys to display
the other items on the screen.
General help
At the bottom of the menu screen is a brief description of the selected item. Use <F12> key
to capture the BIOS screen and save it to the removable storage device.
Configuration fields
These elds show the values for the menu items. If an item is user-congurable, you can
change the value of the eld opposite the item. You cannot select an item that is not
user-congurable.
A congurable eld is highlighted when selected. To change the value of a eld, select it and
press <Enter> to display a list of options.
Last Modified button
This button shows the items that you last modied and saved in BIOS Setup.
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1.2.3 Q-Fan Control
The Q-Fan Control allows you to set a fan prole or manually congure the operating speed
of your CPU and chassis fans.
Click to select a fan to be
configured
Select a profile to
apply to your fans
Click to activate
Click to apply the fan setting
Click to undo the
changes
PWM Mode
Click to go back to main menu
Click to activate DC Mode
Select to manually configure
your fans
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Configuring fans manually
Select Manual from the list of proles to manually congure your fans’ operating speed.
Speed points
Select to manually
configure your fans
To congure your fans:
1. Select the fan that you want to congure and to view its current status.
2. Click and drag the speed points to adjust the fans’ operating speed.
3. Click Apply to save the changes then click Exit (ESC).
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1.2.4 EZ Tuning Wizard
EZ Tuning Wizard allows you to easily overclock your CPU and DRAM, computer usage, and
CPU fan to their best settings. You can also set RAID in your system using this feature.
OC setup
RAID setup
OC Tuning
To start OC Tuning:
1. Press <F11> on your keyboard or click
EZ Tuning Wizard screen.
2. Click OC
then click Next.
3. Select a PC scenario Daily Computing or Gaming/Media Editing, then click Next.
from the BIOS screen to open
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4. Select a Main Cooling System BOX cooler, Tower cooler, Water cooler, or I’m not
sure, then click Next.
5. After selecting the Main Cooling System, click Next then click Yes to start the OC
Tuning.
Creating RAID
To create RAID:
1. Press <F11> on your keyboard or click
EZ Tuning Wizard screen.
2. Click RAID
then click Next.
• Ensure that your HDDs have no existing RAID volumes.
• Ensure to connect your HDDs to Intel
®
SATA connectors.
3. Select the port that you want to set to [RAID] mode, PCIE or SATA, then click Next.
from the BIOS screen to open
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13
4. Check the available storage disk drives, then click Next.
5. Select the type of storage for your RAID, Easy Backup or Super Speed, then click
Next.
a. For Easy Backup, click Next then select from Easy Backup (RAID 1) or Easy
Backup (RAID 10).
You can only select Easy Backup (RAID 10) if you connect four (4) HDDs.
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b. For Super Speed, click Next then select from Super Speed (RAID 0) or Super
Speed (RAID 5).
6. After selecting the type of RAID, click Next then click Yes to continue the RAID setup.
7. After the RAID setup is done, click Yes to exit the setup then click OK to reset your
system.
1.3 My Favorites
My Favorites is your personal space where you can easily save and access your favorite
BIOS items. My Favorites comes with several performance, power saving, and fast boot
related items by default. You can personalize this screen by adding or removing items.
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Adding items to My Favorites
To add BIOS items:
1. Press <F3> on your keyboard or click MyFavorites(F3) from the BIOS screen to open
Setup Tree Map screen.
2. On the Setup Tree Map screen, select the BIOS items that you want to save in My
Favorites screen.
Main menu panel
Selected shortcut
items
Submenu panel
Delete all favorite
items
Recover to default
favorite items
3. Select an item from main menu panel, then click the submenu that you want to save as
favorite from the submenu panel and click
You cannot add the following items to My Favorite items:
• Items with submenu options.
• User-managed items such as language and boot order.
• Conguration items such as Memory SPD Information, system time and date.
or press <Enter> on your keyboard.
4. Click Exit (ESC) or press <Esc> key to close Setup Tree Map screen.
5. Go to My Favorites menu to view the saved BIOS items.
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1.4 Main menu
The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup
program. The Main menu provides you an overview of the basic system information, and
allows you to set the system date, time, language, and security settings.
Security
The Security menu items allow you to change the system security settings.
• If you have forgotten your BIOS password, erase the CMOS Real Time Clock (RTC)
RAM to clear the BIOS password. See section 1.1.6 Onboard buttons and switches
in your user manual for information on how to erase the RTC RAM.
• The Administrator or User Password items on top of the screen show the default [Not
Installed]. After you set a password, these items show [Installed].
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Administrator Password
If you have set an administrator password, we recommend that you enter the administrator
password for accessing the system. Otherwise, you might be able to see or change only
selected elds in the BIOS setup program.
To set an administrator password:
1. Select the Administrator Password item and press <Enter>.
2. From the Create New Password box, key in a password, then press <Enter>.
3. Re-type to conrm the password then select OK.
To change an administrator password:
1. Select the Administrator Password item and press <Enter>.
2. From the Enter Current Password box, key in the current password, then press
<Enter>.
3. From the Create New Password box, key in a new password, then press <Enter>.
4. Re-type to conrm the password then select OK.
To clear the administrator password, follow the same steps as in changing an administrator
password, but leave other elds blank then select OK to continue. After you clear the
password, the Administrator Password item on top of the screen shows [Not Installed].
User Password
If you have set a user password, you must enter the user password for accessing the system.
The User Password item on top of the screen shows the default [Not Installed]. After you set
a password, this item shows [Installed].
To set a user password:
1. Select the User Password item and press <Enter>.
2. From the Create New Password box, key in a password, then press <Enter>.
3. Re-type to conrm the password then select OK.
To change a user password:
1. Select the User Password item and press <Enter>.
2. From the Enter Current Password box, key in the current password, then press
<Enter>.
3. From the Create New Password box, key in a new password, then press <Enter>.
4. Re-type to conrm the password then select OK.
To clear the user password, follow the same steps as in changing a user password, but
leave other elds blank then select OK to continue. After you clear the password, the User
Password item on top of the screen shows [Not Installed].
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1.5 Ai Tweaker menu
The Ai Tweaker menu items allow you to congure overclocking-related items.
Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect eld
values can cause the system to malfunction.
The conguration options for this section vary depending on the CPU and DIMM model you
installed on the motherboard.
Scroll down to display other BIOS items.
Ai Overclock Tuner
This item allows you to select the CPU overclocking options to achieve the desired CPU
internal frequency. Select any of these preset overclocking conguration options:
[Auto] Loads the optimal settings for the system.
[Manual] Automatically optimizes the CPU ratio and BCLK frequency.
[XMP] If you install memory modules supporting the eXtreme Memory Prole
(XMP) Technology, choose this item to set the proles supported by your
memory modules for optimizing the system performance.
The [X.M.P.] conguration option appears only when you install memory modules
supporting the eXtreme Memory Prole(X.M.P.) Technology.
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When the Ai Overclock Tuner is set to [Manual] or [XMP], the following items appear.
BCLK Frequency
This item allows you to set the BCLK (base clock) frequency to enhance the system
performance. Use the <+> or <-> to adjust the value. The values range from 40.0 MHz
to 650.0 MHz.
We recommend you to set the value based on the CPU specication, as high BCLK
frequencies may damage the CPU permanently.
ASUS MultiCore Enhancement
[Auto] This item allows you to maximize the oveclocking performance optimized
[Disabled] This item allows you to set to default core ratio settings.
by ASUS core ratio settings.
CPU Core Ratio
This item allows you to set the CPU core ratio limit per core or synchronize automatically to
all cores.
Conguration options: [Auto] [Sync All Cores] [Per Core]
When the CPU Core Ratio is set to [Sync All Cores], the following item appears.
1-Core Ratio Limit
Enter [Auto] to apply the CPU default Turbo Ratio setting or manually
assign a 1-Core Limit value that must be higher than or equal to the 2-Core
Ratio Limit.
When the CPU Core Ratio is set to [Per Core], the following item appears.
1-Core Ratio Limit
Enter [Auto] to apply the CPU default Turbo Ratio setting or manually
assign a 1-core ratio limit that must be higher than or equal to the 2-core
ratio limit.
2-Core Ratio Limit
Enter [Auto] to apply the CPU default Turbo Ratio setting or manually
assign a 2-core ratio limit that must be higher than or equal to the 3-core
ratio limit.
If you assign a value for 2-Core Ratio Limit, do not set the 1-Core Ratio Limit to [Auto].
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3-Core Ratio Limit
Enter [Auto] to apply the CPU default Turbo Ratio setting or manually
assign a 3-core ratio limit that must be higher than or equal to the 4-core
ratio limit.
If you assign a value for 3-Core Ratio Limit, do not set the 1-Core Ratio Limit and 2-Core
Ratio Limit to [Auto].
4-Core Ratio Limit
Enter [Auto] to apply the CPU default Turbo Ratio setting or manually
assign a 4-core ratio limit that must be lower than or equal to the 3-core
ratio limit.
If you assign a value for 4-Core Ratio Limit, do not set the 1-Core Ratio Limit, 2-Core Ratio
Limit, and 3-Core Ratio Limit to [Auto].
DRAM Odd Ratio Mode
This item allows you to enable or disable availability of odd DRAM ratios for improved
granularity.
Conguration options: [Enabled] [Disabled]
DRAM Frequency
This item allows you to set the memory operating frequency. The congurable options vary
with the BCLK (base clock) frequency setting. Select the auto mode to apply the optimized
setting.
Conguration options: [Auto] [DDR4-800MHz] - [DDR4-4266MHz]
TPU
This item allows you to automatically overclock the CPU and DRAM frequencies and voltage
for an enhanced system performance.
[Keep Current Settings] Keep the current settings without changing anything.
[TPU I] Applies air cooling overclocking conditions.
[TPU II] Applies water cooling overclocking conditions.
Ensure to use water cooling device before selecting [TPU II].
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EPU Power Saving Mode
The ASUS EPU (Energy Processing Unit) sets the CPU in its minimum power consumption
settings. Enabling this item will apply lower CPU Core/Cache Voltage and help save energy
consumption. Set this item to disabled if you are over clocking the system.
Conguration options: [Disabled] [Enabled]
CPU SVID Support
Disable this item to stop the CPU from communicating with the external voltage regulator.
Conguration options: [Auto] [Disabled] [Enabled]
DRAM Timing Control
The subitems in this menu allow you to set the DRAM timing control features. Use the <+>
or <-> keys to adjust the value. To restore the default setting, type [auto] using the keyboard
and press the <Enter> key.
Changing the values in this menu may cause the system to become unstable! If this
happens, revert to the default settings.
Primary Timings
DRAM CAS# Latency
Conguration options: [Auto] [1] – [31]
DRAM RAS# to CAS# Delay
Conguration options: [Auto] [1] – [31]
DRAM RAS# ACT Time
Conguration options: [Auto] [1] – [63]
DRAM COMMAND Rate
Conguration options: [Auto] [1N] [2N] [3N] [N:1]
Secondary Timings
DRAM RAS# to RAS# Delay L
Conguration options: [Auto] [1] – [15]
DRAM RAS# to RAS# Delay S
Conguration options: [Auto] [1] – [15]
DRAM REF Cycle Time
Conguration options: [Auto] [1] – [1023]
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DRAM Refresh Interval
Conguration options: [Auto] [1] – [65535]
DRAM WRITE Recovery Time
Conguration options: [Auto] [1] – [31]
DRAM READ to PRE Time
Conguration options: [Auto] [1] – [15]
DRAM FOUR ACT WIN Time
Conguration options: [Auto] [1] – [63]
DRAM WRITE to READ Delay
Conguration options: [Auto] [1] – [15]
DRAM WRITE to READ Delay L
Conguration options: [Auto] [1] – [15]
DRAM WRITE to READ Delay S
Conguration options: [Auto] [1] – [15]
DRAM CKE Minimum Pulse Width
Conguration options: [Auto] [0] – [15]
DRAM Write Latency
Conguration options: [Auto] [1] – [31]
Skew Control
ODT RTT WR (CHA)
Conguration options: [Auto] [0 DRAM CLOCK] [80 DRAM CLOCK] [120
DRAM CLOCK] [240 DRAM CLOCK] [255 DRAM CLOCK]
ODT RTT PARK (CHA)
Conguration options: [Auto] [0 DRAM CLOCK] [34 DRAM CLOCK]
[40 DRAM CLOCK] [48 DRAM CLOCK] [60 DRAM CLOCK] [80 DRAM
CLOCK] [120 DRAM CLOCK] [240 DRAM CLOCK]
ODT RTT NOM (CHA)
Conguration options: [Auto] [0 DRAM CLOCK] [34 DRAM CLOCK]
[40 DRAM CLOCK] [48 DRAM CLOCK] [60 DRAM CLOCK] [80 DRAM
CLOCK] [120 DRAM CLOCK] [240 DRAM CLOCK]
ODT RTT WR (CHB)
Conguration options: [Auto] [0 DRAM CLOCK] [80 DRAM CLOCK] [120
DRAM CLOCK] [240 DRAM CLOCK] [255 DRAM CLOCK]
ODT RTT PARK (CHB)
Conguration options: [Auto] [0 DRAM CLOCK] [34 DRAM CLOCK]
[40 DRAM CLOCK] [48 DRAM CLOCK] [60 DRAM CLOCK] [80 DRAM
CLOCK] [120 DRAM CLOCK] [240 DRAM CLOCK]
ODT RTT NOM (CHB)
Conguration options: [Auto] [0 DRAM CLOCK] [34 DRAM CLOCK]
[40 DRAM CLOCK] [48 DRAM CLOCK] [60 DRAM CLOCK] [80 DRAM
CLOCK] [120 DRAM CLOCK] [240 DRAM CLOCK]
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