Asus STRIX B550-E GAMING User’s Manual

ROG STRIX
B550-E GAMING

BIOS Manual

Motherboard

E17689
First Edition

December 2020

Copyright© 2020 ASUSTeK COMPUTER INC. All Rights Reserved.

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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
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ROG STRIX B550-E GAMING 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 QFan Control................................................................................ 10

1.3 My Favorites ................................................................................................ 12

1.4 Main menu ................................................................................................... 14

1.5 Ai Tweaker menu ......................................................................................... 16

1.6 Advanced menu .......................................................................................... 24

1.6.1 AMD fTPM conguration .............................................................. 25

1.6.2 CPU Conguration ....................................................................... 26

1.6.3 SATA Conguration ..................................................................... 27

1.6.4 Onboard Devices Conguration ................................................... 28

1.6.5 APM Conguration ....................................................................... 31

1.6.6 PCI Subsystem Settings .............................................................. 32

1.6.7 USB Conguration ....................................................................... 32

1.6.8 Network Stack Conguration........................................................ 33

1.6.9 HDD/SSD SMART Information .................................................... 34

1.6.10 NVMe Conguration ..................................................................... 34

1.6.11 AMD PBS ..................................................................................... 34

1.6.12 AMD Overclocking ....................................................................... 35

1.6.13 AMD CBS ..................................................................................... 36

1.7 Monitor menu .............................................................................................. 46

1.8 Boot menu ................................................................................................... 51

1.9 Tool menu .................................................................................................... 56

1.9.1 ASUS EZ Flash 3 Utility ............................................................... 56

1.9.2 ASUS Secure Erase..................................................................... 56

1.9.3 ASUS User Prole........................................................................ 57

1.9.4 ASUS SPD Information ................................................................ 57

1.9.5 Graphics Card Information ........................................................... 57

1.9.6 ASUS Armoury Crate ................................................................... 57

1.10 Exit menu ..................................................................................................... 58

1.11 Updating BIOS ............................................................................................. 59

1.11.1 EZ Update .................................................................................... 59

1.11.2 ASUS EZ Flash 3 ......................................................................... 60

1.11.3 ASUS CrashFree BIOS 3 ............................................................. 61

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3

BIOS Setup

1.1 Knowing BIOS

The new ASUS UEFI BIOS is a Unied 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 specied.

BIOS (Basic Input and Output System) stores system hardware settings such as storage

device conguration, overclocking settings, advanced power management, and boot
device conguration 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 for your motherboard, rename it as

XXXXX.CAP. The name of the CAP le varies depending on models. Refer to the user

manual that came with your motherboard for the name.

• 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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ROG STRIX B550-E GAMING BIOS Manual

1.2 BIOS setup program

Use the BIOS Setup to update the BIOS or congure its parameters. The BIOS screen

includes 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 your motherboard 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

Displays the CPU/motherboard
temperature, CPU voltage output,
CPU/chassis/AIO PUMP fan speed,
and SATA information

Selects the display language
of the BIOS setup program

Searches by BIOS item name,
enter the item name to find the
related item listing

the selected mode. Click < or > to

switch EZ System Tuning modes

Turns the RGB LED lighting or
functional LED on or off

Displays the CPU Fan’s speed. Click
the button to manually tune the fans

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

The boot device options vary depending on the devices you installed to the system.

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ROG STRIX B550-E GAMING BIOS Manual

1.2.2 Advanced Mode

The Advanced Mode provides advanced options for experienced end-users to congure
the BIOS settings. The gure below shows an example of the Advanced Mode. Refer to the
following sections for the detailed congurations.

To switch from EZ Mode to Advanced Mode, click Advanced Mode(F7) or press the <F7>
hotkey.

Menu bar

submenu items

Menu items

Language

MyFavorite(F3)

General help

Qfan Control(F6)

Configuration fields

Pop-up Menu

Search(F9)

Last modified
settings

AURA ON/OFF(F4)

Scroll bar

Go back to EZ
Mode

Displays a quick overview

of the system status

Hot keys

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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 conguration.

For changing the basic system conguration

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 conguration

For conguring options for special functions

For selecting the exit options and loading default settings

Menu items

The highlighted item on the menu bar displays the specic 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.

QFan 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 QFan Control for more information.

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ROG STRIX B550-E GAMING BIOS Manual

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-congurable, you can
change the value of the eld opposite the item. You cannot select an item that is not
user-congurable.

A congurable 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 modied and saved in BIOS Setup.

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1.2.3 QFan Control

The QFan Control allows you to set a fan prole or manually congure 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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ROG STRIX B550-E GAMING BIOS Manual

Configuring fans manually

Select Manual from the list of proles to manually congure your fans’ operating speed.

Speed points

Select to manually

configure your fans

To congure your fans:

1. Select the fan that you want to congure 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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1.3 My Favorites

My Favorites is your personal space where you can easily save and access your favorite

BIOS items. You can personalize this screen by adding or removing items.

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ROG STRIX B550-E GAMING BIOS Manual

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 or press <Enter> on your keyboard.

You cannot add the following items to My Favorite items:

• Items with submenu options.

• User-managed items such as language and boot order.

• Conguration items such as Memory SPD Information, system time and date.

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 the motherboard for information on how to
erase the RTC RAM via the Clear CMOS jumper.

• 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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ROG STRIX B550-E GAMING BIOS Manual

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 conrm 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 conrm 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 conrm 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 conrm 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 congure 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 conguration 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

Allows you to select the CPU overclocking options to achieve the desired CPU internal

frequency. Conguration options:

[Auto] Loads the optimal settings for the system.

[Manual] Allows you to individually set overclocking parameters.

The following item appears only when you set the Ai Overclock Tuner to [Manual].

BCLK Frequency

This item allows you to set the BCLK frequency to enhance the system performance.

Use the <+> or <-> to adjust the value. The values range from 96.0 MHz to 118.0 MHz.

SB Clock Spread Spectrum

This item allows you to enable or disable CG1_PLL Spread Spectrum. Conguration options:

[Auto] [Enabled] [Disabled]

ASUS Performance Enhancement

This item allows the CPU to maintain boost frequencies longer for a better performance.

Conguration options: [Disabled] [Enabled]

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ROG STRIX B550-E GAMING BIOS Manual

Memory Frequency

This item allows you to set the memory operating frequency. The congurable options vary
with the BCLK (base clock) frequency setting. Select the auto mode to apply the optimized
setting. Conguration options: [Auto] [DDR4-1333MHz] – [DDR4-6000MHz]

Selecting a very high memory frequency may cause the system to become unstable! If this
happens, revert to the default setting.

FCLK Frequency

This item allows you to specify the FCLK frequency.

Conguration options: [Auto] [666MHz] [800MHz] – [3000MHz]

CPU Core Ratio

This item allows you to set the CPU core ratio. Use the <+> or <-> keys to adjust the value.
The values depend on the CPU installed.

CPU Core Ratio (Per CCX)

Core VID

This item allows you to set a custom CPU core VID. Use the <+> or <-> to adjust the
value. The values range from 0.700 to 1.550.

CCX0/1 Ratio

This item allows you to set a custom Core Ratio for this CCX. Use the <+> or <-> to
adjust the value. The values range from 28.00 to 63.75.

TPU

The TPU automatically overclocks the CPU frequency and voltage to enhance the system
performance. It also boosts the CPU graphics performance according to the CPU graphics

loading. Conguration options: [Keep Current Settings] [OC Tuner]

To keep the current overclocking tuner status, select [Keep Current Settings].

Performance Bias

This item allows you to select different values to help different Software’s performance.

Conguration options: [Auto] [None] [CBR15 Gentle] [Aida/Geekbench] [CBR15 Aggressive]

Precision Boost Overdrive

This item allows the processor to run beyond the dened values for PPT, VDD_CPU EDC,

VDD_CPU TDC, VDD_SOC EDC, VDD_SOC TDC set as the boards limits, and allows it to
boost at higher voltages for a longer duration.

PBO Fmax Enhancer

When enabled, the peak frequencies (Fmax) will be potentially improved during single

threaded workloads. Conguration options: [Auto] [Disabled] [Enabled]

Precision Boost Overdrive

This item allows you to set the precise boost overdrive.

Conguration options: [Auto] [Disabled] [Enabled] [Manual]

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Precision Boost Overdrive Scalar

This item allows you to set the scale of the CPU frequency boost.

Conguration options: [Auto] [Manual]

Max CPU Boost Clock Override

This item allows you to increase the maximum CPU frequency that may be

automatically achieved by the Precision Boost 2 algorithm. Conguration options:
[Auto] [0MHz] [25MHz] [75MHz] [100MHz] [125MHz] [150MHz] [175MHz] [200MHz]

Platform Thermal Throttle Limit

This item allows you to decrease the maximum allowed processor temperature

(celsius).Conguration options: [Auto] [Manual]

DRAM Timing Control

The sub-items in this menu allow you to set the DRAM timing control features. Use the
<+> and <-> 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.

DRAM CAS# Latency

Conguration options: [Auto] [5] – [33]

Trcdrd

Conguration options: [Auto] [8] – [27]

Trcdwr

Conguration options: [Auto] [8] – [27]

DRAM RAS# PRE Time

Conguration options: [Auto] [5] – [27]

DRAM RAS# ACT Time

Conguration options: [Auto] [8] – [58]

Trc

Conguration options: [Auto] [29] – [135]

TrrdS

Conguration options: [Auto] [4] – [12]

TrrdL

Conguration options: [Auto] [4] – [12]

Tfaw

Conguration options: [Auto] [6] – [54]

TwtrS

Conguration options: [Auto] [2] – [14]

TwtrL

Conguration options: [Auto] [2] – [14]

Twr

Conguration options: [Auto] [10] – [81]

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ROG STRIX B550-E GAMING BIOS Manual

Trcpage

Conguration options: [Auto] [0] -[1023]

TrdrdScl

Conguration options: [Auto] [1] – [15]

TwrwrScl

Conguration options: [Auto] [1] – [63]

Trfc

Conguration options: [Auto] [60] – [1023]

Trfc2

Conguration options: [Auto] [60] – [1023]

Trfc4

Conguration options: [Auto] [60] – [990]

Tcwl

Conguration options: [Auto] [9] – [22]

Trtp

Conguration options: [Auto] [5] – [14]

Trdwr

Conguration options: [Auto] [1] – [31]

Twrrd

Conguration options: [Auto] [1] – [15]

TwrwrSc

Conguration options: [Auto] [1] – [15]

TwrwrSd

Conguration options: [Auto] [1] – [15]

TwrwrDd

Conguration options: [Auto] [1] – [15]

TrdrdSc

Conguration options: [Auto] [1] – [15]

TrdrdSd

Conguration options: [Auto] [1] – [15]

TrdrdDd

Conguration options: [Auto] [1] – [15]

Tcke

Conguration options: [Auto] [1] – [31]

ProcODT

Conguration options: [Auto] [High Impedance] [480ohm] [240ohm] [160ohm] [120ohm]

[96ohm] [80ohm] [68.6ohm] [60ohm] [53.3ohm] [43.6ohm] [40ohm] [36.9ohm]
[34.3ohm] [32ohm] [30ohm] [28.2ohm]

Cmd2T

Conguration options: [Auto] [1T] [2T]

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