Asus ROG STRIX B550-E GAMING User manual

ROG STRIX

B550-E GAMING

BIOS Manual

Motherboard

2ROG STRIX B550-E GAMING BIOS Manual

E17689

First Edition

December 2020

No part of this manual, including the products and software described in it, may be reproduced,

transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any

means, except documentation kept by the purchaser for backup purposes, without the express written

permission of ASUSTeK COMPUTER INC. (“ASUS”).

Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless

such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the

product is defaced or missing.

ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS

OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS

DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,

LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),

EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY

DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.

SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR

INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,

AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO

RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS

MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.

Products and corporate names appearing in this manual may or may not be registered trademarks or

copyrights of their respective companies, and are used only for identication or explanation and to the

owners’ benet, without intent to infringe.

ROG STRIX B550-E GAMING BIOS Manual 3

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

4ROG STRIX B550-E GAMING BIOS Manual

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.

BIOS Setup

1.1 Knowing BIOS

ROG STRIX B550-E GAMING BIOS Manual 5

• 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.

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.

6ROG STRIX B550-E GAMING BIOS Manual

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.

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

Selects the display language

of the BIOS setup program

Displays the CPU/motherboard

temperature, CPU voltage output,

CPU/chassis/AIO PUMP fan speed,

and SATA information

Displays the system properties of

the selected mode. Click < or > to

switch EZ System Tuning modes

Loads optimized

default settings

Displays the CPU Fan’s speed. Click

the button to manually tune the fans

Saves the changes

and resets the system

Click to display boot devices

Selects the boot device priority

Click to go to Advanced mode

Turns the RGB LED lighting or

functional LED on or off

Searches by BIOS item name,

enter the item name to find the

related item listing

ROG STRIX B550-E GAMING BIOS Manual 7

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 items

General help

Menu bar Language AURA ON/OFF(F4)

Qfan Control(F6)

MyFavorite(F3)

Scroll bar

Pop-up Menu

Configuration fields Last modified

settings

Go back to EZ

Mode

Displays a quick overview

of the system status

submenu items

Search(F9)

Hot keys

8ROG STRIX B550-E GAMING BIOS Manual

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 frequently-

used 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.

Menu bar

The menu bar on top of the screen has the following main items:

My Favorites For saving the frequently-used system settings and conguration.

Main For changing the basic system conguration

Ai Tweaker For changing the overclocking settings

Advanced For changing the advanced system settings

Monitor For displaying the system temperature, power status, and changing

the fan settings.

Boot For changing the system boot conguration

Tool For conguring options for special functions

Exit For selecting the exit options and loading default settings

ROG STRIX B550-E GAMING BIOS Manual 9

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.

10 ROG STRIX B550-E GAMING BIOS Manual

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 Click to activate

PWM Mode

Click to undo the

changes

Click to apply the fan setting

Click to go back to main menu

Select a profile to

apply to your fans

Click to activate DC Mode

Select to manually configure

your fans

ROG STRIX B550-E GAMING BIOS Manual 11

Speed points Select to manually

configure your fans

Configuring fans manually

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

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).

12 ROG STRIX B550-E GAMING BIOS Manual

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.

ROG STRIX B550-E GAMING BIOS Manual 13

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.

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.

Main menu panel

Submenu panel

Selected shortcut

items

Delete all favorite

items

Recover to default

favorite items

14 ROG STRIX B550-E GAMING BIOS Manual

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].

ROG STRIX B550-E GAMING BIOS Manual 15

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].

16 ROG STRIX B550-E GAMING BIOS Manual

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]

ROG STRIX B550-E GAMING BIOS Manual 17

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]

18 ROG STRIX B550-E GAMING BIOS Manual

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]

ROG STRIX B550-E GAMING BIOS Manual 19

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]

20 ROG STRIX B550-E GAMING BIOS Manual

Gear Down Mode

Conguration options: [Auto] [Enabled] [Disabled]

Power Down Enable

Conguration options: [Auto] [Enabled] [Disabled]

RttNom

Conguration options: [Auto] [Rtt_Nom Disable] [RZQ/4] [RZQ/2] [RZQ/6] [RZQ/1]

[RZQ/5] [RZQ/3] [RZQ/7]

RttWr

Conguration options: [Auto] [Dynamic ODT Off] [RZQ/2] [RZQ/1] [Hi-Z] [RZQ/3]

RttPark

Conguration options: [Auto] [Rtt_PARK Disable] [RZQ/4] [RZQ/2] [RZQ/6] [RZQ/1]

[RZQ/5] [RZQ/3] [RZQ/7]

MemAddrCmdSetup

Conguration options: [Auto] [0]-[63]

MemCsOdtSetup

Conguration options: [Auto] [0]-[63]

MemCkeSetup

Conguration options: [Auto] [0]-[63]

MemCadBusClkDrvStren

Conguration options: [Auto] [120.0 Ohm] [60.0 Ohm] [40.0 Ohm] [30.0 Ohm] [24.0

Ohm] [20.0 Ohm]

MemCadBusAddrCmdDrvStren

Conguration options: [Auto] [120.0 Ohm] [60.0 Ohm] [40.0 Ohm] [30.0 Ohm] [24.0

Ohm] [20.0 Ohm]

MemCadBusCsOdtDrvStren

Conguration options: [Auto] [120.0 Ohm] [60.0 Ohm] [40.0 Ohm] [30.0 Ohm] [24.0

Ohm] [20.0 Ohm]

MemCadBusCkeDrvStren

Conguration options: [Auto] [120.0 Ohm] [60.0 Ohm] [40.0 Ohm] [30.0 Ohm] [24.0

Ohm] [20.0 Ohm]

Mem Over Clock Fail Count

Conguration options: [Auto] [0]- [10]

DIGI+ VRM

Changing the values in this menu may cause the system to become unstable! If this

happens, revert to the default settings.

VDDCR CPU Load Line Calibration

Load-line affects CPU power voltage. The CPU working voltage decreases

proportionally to CPU loading. Higher load-line calibration could get higher voltage and

good overclocking performance, but increases the CPU and VRM thermal conditions.

Select from levels 1 to 5 to adjust the load-line slope.

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