ASRock B550 Pro4 Service Manual

Version 1.0

Published May 2020

Copyright©2020 ASRock INC. All rights reserved.

Copyright Notice:

No part of this documentation may be reproduced, transcribed, transmitted, or
translated in any language, in any form or by any means, except duplication of
documentation by the purchaser for backup purpose, without written consent of
ASRock Inc.

Products and corporate names appearing in this documentation 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.

Disclaimer:

Specications and information contained in this documentation are furnished for
informational use only and subject to change without notice, and should not be
constructed as a commitment by ASRock. ASRock assumes no responsibility for
any errors or omissions that may appear in this documentation.

With respect to the contents of this documentation, ASRock does not provide
warranty of any kind, either expressed or implied, including but not limited to
the implied warranties or conditions of merchantability or tness for a particular
purpose.

In no event shall ASRock, its directors, ocers, employees, or agents be liable for
any indirect, special, incidental, or consequential damages (including damages for
loss of prots, loss of business, loss of data, interruption of business and the like),
even if ASRock has been advised of the possibility of such damages arising from any
defect or error in the documentation or product.

is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that

may cause undesired operation.

CALIFORNIA, USA ONLY

e Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance
controlled in Perchlorate Best Management Practices (BMP) regulations passed by the
California Legislature. When you discard the Lithium battery in California, USA, please
follow the related regulations in advance.
“Perchlorate Material-special handling may apply, see ww w.dtsc.ca.gov/hazardouswaste/
perchlorate”

ASRock Website: http://www.asrock.com

AUSTRALIA ONLY

Our goods come with guarantees that cannot be excluded under the Australian Consumer
Law. You are entitled to a replacement or refund for a major failure and compensation for
any other reasonably foreseeable loss or damage caused by our goods. You are also entitled
to have the goods repaired or replaced if the goods fail to be of acceptable quality and the
failure does not amount to a major failure. If you require assistance please call ASRock Tel

: [phone] ext.123 (Standard International call charges apply)

e terms HDMI® and HDMI High-Denition Multimedia Interface, and the HDMI

logo are trademarks or registered trademarks of HDMI Licensing LLC in the United
States and other countries.

Contents

Chapter 1 Introduction 1

1.1 Package Contents 1

1.2 Specications 2

1.3 Motherboard Layout 7

1.4 I/O Panel 9

Chapter 2 Installation 10

2.1 Installing the CPU 11

2.2 Installing the CPU Fan and Heatsink 13

2.3 Installing Memory Modules (DIMM) 21

2.4 Expansion Slots (PCI Express Slots) 24

2.5 Jumpers Setup 25

2.6 Onboard Headers and Connectors 26

2.7 Post Status Checker 31

2.8 CrossFireXTM and Quad CrossFireXTM Operation Guide 32

2.8.1 Installing Two CrossFireXTM-Ready Graphics Cards 32

2.8.2 Driver Installation and Setup 34

2.9 M.2_SSD (NGFF) Module Installation Guide (M2_1) 35

2.10 M.2 WiFi/BT Module Installation Guide (M2_2) 38

2.11 M.2_SSD (NGFF) Module Installation Guide (M2_3) 40

Chapter 3 Software and Utilities Operation 43

3.1 Installing Drivers 43

3.2 ASRock Motherboard Utility (A-Tuning) 44

3.3 ASRock Live Update & APP Shop 47

3.3.1 UI Overview 47

3.3.2 Apps 48

3.3.3 BIOS & Drivers 51

3.3.4 Setting 52

3.4 Nahimic Audio 53

3.5 ASRock Polychrome SYNC 54

Chapter 4 UEFI SETUP UTILITY 57

4.1 Introduction 57

4.1.1 UEFI Menu Bar 57

4.1.2 Navigation Keys 58

4.2 Main Screen 59

4.3 OC Tweaker Screen 60

4.4 Advanced Screen 64

4.4.1 CPU Conguration 65

4.4.2 Onboard Devices Conguration 66

4.4.3 Storage Conguration 68

4.4.4 ACPI Conguration 69

4.4.5 Trusted Computing 70

4.4.6 AMD CBS 71

4.4.7 AMD PBS 72

4.4.8 AMD Overclocking 73

4.5 Tools 74

4.6 Hardware Health Event Monitoring Screen 75

4.7 Security Screen 78

4.8 Boot Screen 79

4.9 Exit Screen 82

Chapter 1 Introduction

ank you for purchasing ASRock B550 Pro4 motherboard, a reliable motherboard

produced under ASRock ’s consistently stringent quality control. It delivers excellent

performance with robust design conforming to ASRock ’s commitment to quality

and endurance.

In this manual, Chapter 1 and 2 contains the introduction of the motherboard

and step-by-step installation guides. Chapter 3 contains the operation guide of the

soware and utilities. Chapter 4 contains the conguration guide of the BIOS setup.

Becau se the motherboard specications and the BIOS soware might be updated, the
content of this manual will be subject to change without notice. In ca se any modica­tions of this manual occur, the updated version will be available on ASRock’s website
without further notice. If you require technical suppor t related to this motherboard,
please visit our website for spe cic information about the model you are using. You
may nd the l atest VGA cards and CPU support list on ASRock ’s website a s well.
ASRock website http://www.asrock.com.

1.1 Package Contents

ASRock B550 Pro4 Motherboard (ATX Form Factor)

•

ASRock B550 Pro4 Quick Installation Guide

•

ASRock B550 Pro4 Support CD

•

2 x Serial ATA (SATA) Data Cables (Optional)

•

3 x Screws for M.2 Sockets (Optional)

•

1 x Stando for M.2 Socket (Optional)

•

1 x I/O Panel Shield

•

B550 Pro4

English

1

1.2 Specications

Platform

CPU

Chipset

Memory

•

•

•

•

* Not compatible with AMD Ryzen™ 5 3400G and Ryzen™ 3

3200G.

•

•

•

•

•

•

•

* Please refer to Memory Support List on ASRock's website for

more information. (http://www.asrock.com/)

* Please refer to page 21 for DDR4 UDIMM maximum frequency

support.

•

•

•

ATX Form Factor

Solid Capacitor design

2oz Copper PCB

Supports 3rd Gen AMD AM4 Ryzen™ / future AMD Ryzen™

Processors (3000 and 4000 Series Processors)*

Digi Power design

8 Power Phase design

AMD B550

Dual Channel DDR4 Memory Technology

4 x DDR4 DIMM Slots

AMD Ryzen series CPUs (Matisse) support DDR4 4533+(OC)

/446 6(OC)/4400(OC)/4333(OC)/4266(OC)/4200(OC)/

4133(OC)/40 00(OC)/3866(OC)/3800(OC)/3733(OC)/

3600(OC)/3466(OC)/3200/2933/2667/2400/2133 ECC & non-

ECC, un-buered memory*

AMD Ryzen series APUs (Renoir) support DDR4 4733+(OC)

/4666(OC)/4600(OC)/4533(OC)/4466(OC)/4400(OC)/4333

(OC)/426 6(OC)/4200(OC)/4133(OC)/4000(OC)/3866(OC)/

3800(OC)/3733(OC)/3600(OC)/3466(OC)/3200/2933/2667-

/2400/2133 ECC & non-ECC, un-buered memory*

Max. capacity of system memory: 128GB

Supports Extreme Memory Prole (XMP) memory modules

15μ Gold Contact in DIMM Slots

English

2

B550 Pro4

Expansion
Slot

Graphics

AMD Ryzen series CPUs (Matisse)

2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3:

•

Gen3 x4 mode)*

AMD Ryzen series APUs (Renoir)

2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3:

•

Gen3 x4 mode)*

* Supports NVMe SSD as boot disks

2 x PCI Express 3.0 x1 Slots

•

Supports AMD Quad CrossFireXTM and CrossFireX

•

1 x M.2 Socket (Key E), supports ty pe 2230 WiFi/BT module

•

Integrated AMD Radeon

•

TM

Vega Series Graphics in Ryzen

TM

Series APU*

* Actual support may vary by CPU

DirectX 12, Pixel Shader 5.0

•

Shared memory default 2GB. Max Shared memory supports

•

up to 16GB.

* e Max shared memory 16GB requires 32GB system memory

installed.

Dual graphics output: support HDMI and D-Sub ports by

•

independent display controllers

Supports HDMI 2.1 with max. resolution up to 4K x 2K

•

(4096x2160) @ 60Hz

Supports D-Sub with max. resolution up to 1920x1200 @

•

60Hz

Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and

•

HBR (High Bit Rate Audio) with HDMI 2.1 Port

(Compliant HDMI monitor is required)

Supports HDR (High Dynamic Range) with HDMI 2.1

•

Supports HDCP 2.3 with HDMI 2.1 Port

•

Supports 4K Ultra HD (UHD) playback with HDMI 2.1 Port

•

Supports Microso PlayReady®

•

English

3

Audio

LAN

Rear Panel
I/O

7.1 CH HD Audio with Content Protection (Realtek ALC1200

•

Audio Codec)

Premium Blu-ray Audio support

•

Supports Surge Protection

•

PCB Isolate Shielding

•

Individual PCB Layers for R/L Audio Channel

•

Nahimic Audio

•

PCIE x1 Gigabit LAN 10/100/1000 Mb/s

•

Realtek RTL8111H

•

Supports Wake-On-LAN

•

Supports Lightning/ESD Protection

•

Supports Energy Ecient Ethernet 802.3az

•

Supports PXE

•

Antenna Bracket

•

1 x PS/2 Mouse/Keyboard Port

•

1 x D-Sub Port

•

1 x HDMI Port

•

1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD Pro-

•

tec tion)

1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD Pro-

•

tec tion)

4 x USB 3.2 Gen1 Ports (Supports ESD Protection)

•

1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED

•

LED)

HD Audio Jacks: Line in / Front Speaker / Microphone

•

English

4

Storage

6 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0,

•

RAID 1 and RAID 10), NCQ, AHCI and Hot Plug*

* M2_ 3 and SATA3_5_6 share lanes. If either one of them is in

use, the other one will be disabled.

1 x Hyper M.2 Socket (M2_1), supports M Key ty pe

•

2260/2280/22110 M.2 PCI Express module up to Gen4x4 (64

Gb/s) (with Matisse) or Gen3x4 (32 Gb/s) (with Renoir)**

1 x M.2 Socket (M2_3), supports M Key ty pe 2242/2260/2280

•

M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up

to Gen3 x2 (16 Gb/s)**

** Supports NVMe SSD as boot disks

** Supports ASRock U.2 Kit

Connector

B550 Pro4

1 x COM Port Header

•

1 x SPI TPM Header

•

1 x Power LED and Speaker Header

•

2 x RGB LED Headers

•

* Support in total up to 12V/3A, 36W LED Strip

2 x Addressable LED Headers

•

* Support in total up to 5V/3A, 15W LED Strip

1 x CPU Fan Connector (4-pin)

•

* e CPU Fan Connector supports the CPU fan of ma ximum

1A (12W) fan power.

1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan

•

Speed Control)

4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan

•

Speed Control)

* e Chassis/Water Pump Fan supports the water cooler fan of

maximum 2A (24W) fan power.

* CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP, CHA_

FAN3/WP and CHA_FAN4/WP can auto detect if 3-pin or 4-pin

fan is in use.

1 x 24 pin ATX Power Connector

•

1 x 8 pin 12V Power Connector

•

1 x 4 pin 12V Power Connector

•

1 x Front Panel Audio Connector

•

2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD

•

Protection)

1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)

•

(Supports ESD Protection)

BIOS
Feature

AMI UEFI Legal BIOS with GUI support

•

Supports “Plug and Play”

•

ACPI 5.1 compliance wake up events

•

Supports jumperfree

•

SMBIOS 2.3 support

•

CPU, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5,

•

2.5V_PROM, +1.8VSB, VDDP Voltage Multi-adjustment

English

5

Temperature Sensing: CPU, CPU/Water Pump, Chassis/Wa-

Hardware
Monitor

•

ter Pump Fans

Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water

•

Pump Fans

Quiet Fan (Auto adjust chassis fan speed by CPU tempera-

•

ture): CPU, CPU/Water Pump, Chassis/Water Pump Fans

Fan Multi-Speed Control: CPU, CPU/Water Pump, Chassis/

•

Water Pump Fans

Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU VD-

•

DCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, +1.8V, VDDP

Microso® Windows® 10 64-bit

OS

Certica­tions

* For detailed product information, please visit our website: http://www.asrock .com

Please realize that the re is a certain r isk involved with overclo cking, including adju st­ing the setting in the BIOS, applying Untied Ove rclocking Technology, or using third­party o verclocking tools. Overclocking may aect your system’s stability, or even c ause
damage to the components and dev ices of your system. It should be done at your own
risk and expense. We are not responsible for possible damage cau sed by overclocking.

•

FCC, CE

•

ErP/EuP ready (ErP/EuP ready power supply is required)

•

English

6

1.3 Motherboard Layout

DDR 4_A2 (6 4 bit, 28 8-pin m odule )

DDR 4_A1 (6 4 bit, 28 8-pin m odule )

DDR 4_B2 (6 4 bit, 28 8-pin m odule )

DDR 4_B1 (6 4 bit, 28 8-pin m odule )

ATX12V1

ATXP WR 1

PCIE3

HDLED RESET

PLED PWRBTN

PANEL1

1

USB_3_4

1

1

SPK_PLED1

1

HD_AUDIO1

PCIE1

RoHS

12

15

19

2

Hyper M.2

PCIe Gen4 x4

CMOS

Battery

PCIE2

14

9

USB3_ 7_8

10

SATA3_6

SATA3_5

SATA3_4

SATA3_3

CLRMOS1

1

M2_2

M2_WIFI_CT1

M2_3

C 7

C 6

C 5

3

PCIE4

T

T

T

AUDIO
CODEC

SUPER

I/O

13

20

22

2324

30

21

6

5

CHA_FAN3/WP

CHA_FAN1/WP

CPU_FAN2/WP

ATX12V2

CPU_FAN1

4

1

18

ADDR_LED1

1

RGB_LED1

1

28

ADDR_LED2

1

RGB_LED2

1

7

8

31

CPU

DRAM

VGA

BOOT

Top:
RJ-45

USB 3.2 Gen1
T: USB3_5
B: USB3_6

PS2

Keybo ard

/Mous e

Top:

LINE I N

Cent er:

FRON T

Bott om:

MIC IN

USB 3.2 Gen2
T:USB31_TA_1
B: USB31_TC_1

USB_1_2

1

29

C 8

T

SOCKETAM4

AMD

B550

HDMI 1

VGA 1

17

16

SATA3_2

SATA3_1

COM1

1

25

CHA_FAN2/WP

M2_1

C 3

C 2

T

T

C 8

T

C 1

T

27

26

CHA_FAN4/WP

1

SPI_TPM_J1

11

USB 3.2 Ge n1

T: USB3_1

B: USB3_ 2

B550 Pro4

English

7

English

No. Description

1 CPU Fan / Waterpump Fan Connector (CPU_FAN2/WP)

2 ATX 12V Power Connector (ATX12V1)

3 ATX 12V Power Connector (ATX12V2)

4 CPU Fan Connector (CPU_FAN1)

5 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)

6 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)

7 RGB LED Header (RGB_LED2)

8 Addressable LED Header (ADDR_LED2)

9 ATX Power Connector (ATXPWR1)

10 USB 3.2 Gen1 Header (USB3_7_8)

11 SPI TPM Header (SPI_TPM_J1)

12 SATA3 Connector (SATA3_5)

13 SATA3 Connector (SATA3_6)

14 SATA3 Connector (SATA3_3)

15 SATA3 Connec tor (SATA3_4)

16 SATA3 Connector (SATA3_1)

17 SATA3 Connector (SATA3_2)

18 Post Status Checker (PSC)

19 System Panel Header (PANEL1)

20 Power LED and Speaker Header (SPK_PLED1)

21 Chassis Fan / Waterpump Fan Connector (CHA_FAN1/WP)

22 Clear CMOS Jumper (CLRCMOS1)

23 USB 2.0 Header (USB_3_4)

24 USB 2.0 Header (USB_1_2)

25 Chassis Fan / Waterpump Fan Connector (CHA_FAN2/WP)

26 Chassis Fan / Waterpump Fan Connector (CHA_FAN4/WP)

27 Addressable LED Header (ADDR_LED1)

28 RGB LED Header (RGB_LED1)

29 COM Port Header (COM1)

30 Front Panel Audio Header (HD_AUDIO1)

31 Chassis Fan / Waterpump Fan Connector (CHA_FAN3/WP)

8

1.4 I/O Panel

1

B550 Pro4

5

2

3

4

6

12

11

10

9

8

No. Description No. Description

1 PS/2 Mouse/Keyboard Port 7 Microphone (Pink)**

2 D-Sub Port 8 USB 3.2 Gen1 Ports (USB3_5_6)

USB 3.2 Gen2 Type-A Port (USB31_

3

TA _1)

USB 3.2 Gen2 Type-C Port (USB31_

9

TC _1)

4 LAN RJ-45 Port* 10 Antenna Bracket

5 Line In (Light Blue)** 11 HDMI Port

6 Front Speaker (Lime)** 12 USB 3.2 Gen1 Ports (USB3_1_2)

* ere are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications .

ACT/LINK LED

SPEED LED

LAN Por t

Activity / Link LED Speed LED

Status Description Status Description

O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection

7

** Function of the Audio Ports in 7.1-channel Conguration:

Port Function

Light Blue (Rear panel) Rear Speaker Out
Lime (Rear panel) Front Speaker Out
Pink (Rear panel) Central /Subwoofer Speaker Out
Lime (Front panel) Side Speaker Out

English

9

Chapter 2 Installation

is is an ATX form factor motherboard. Before you install the motherboard, study

the conguration of your chassis to ensure that the motherboard ts into it.

Pre-installation Precautions

Take note of the following precautions before you install motherboard components

or change any motherboard settings.

Make sure to unplug the power cord before installing or removing the motherboard.

•

Failure to do so may cause physical injuries to you and damages to motherboard

components.

In order to avoid damage from static electricity to the motherboard’s components,

•

NEVER place your motherboard directly on a carpet. Also remember to use a grounded

wrist strap or touch a safety grounded object before you handle the components.

Hold components by the edges and do not touch the ICs.

•

Whenever you uninstall any components, place them on a grounded anti-static pad or

•

in the bag that comes with the components.

When placing screws to secure the motherboard to the chassis, please do not over-

•

tighten the screws! Doing so may damage the motherboard.

English

10

2.1 Installing the CPU

Unplug all power cables be fore installing the CPU.

1

B550 Pro4

o

90

2

English

11

3

English

12

2.2 Installing the CPU Fan and Heatsink

Aer you install the CPU into this motherboard, it is necessary to install a larger

heatsink and cooling fan to dissipate heat. You also need to spray thermal grease

between the CPU and the heatsink to improve heat dissipation. Ma ke sure that the

CPU and the heatsink are securely fastened and in good contact with each other.

Please turn o the power or remove the power cord before changing a CPU or heatsink.

Installing the CPU Box Cooler SR1

1

B550 Pro4

2

English

13

3

English

14

4

1

N

FA

_

U

P

C

Installing the AM4 Box Cooler SR2

1

B550 Pro4

2

English

15

3

English

16

4

1

N

FA

_
U

P

C

*e diagrams shown here are for reference only. e header might be in a dierent

position on your motherboard.

B550 Pro4

17

English

Installing the AM4 Box Cooler SR3

1

English

18

2

B550 Pro4

3

4

19

English

5

N

1

R

G

CPU_FAN1

6

English

20

2

D

E

L

_

B

+12V

*e diagrams shown here are for reference only. e header might be in a dierent

position on your motherboard.

FA

_

U
P
C

2.3 Installing Memory Modules (DIMM)

is motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots,

and supports Dual Channel Memory Technology.

1. For dual channel conguration, you always need to install identical (the same

brand, speed , size and chip-type) DDR4 DIMM pairs.

2. It is un able to activate D ual Channel Memory Technology with only one or three
memory module installed.

3. It is not allowe d to install a DDR, DDR 2 or DDR3 memory module into a DDR4
slot; otherwise, this motherboard and DIMM may be damaged.

DDR4 UDIMM Maximum Frequency Support

Ryzen Series CPUs (Matisse):

B550 Pro4

UDIMM Memory Slot

A1 A2 B1 B2

- SR - - 3200

- DR - - 3200

- SR - SR 3200

- DR - DR 3200

SR SR SR SR 2933

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2667

Frequency

(Mhz)

English

21

Ryzen Series APUs (Renoir):

UDIMM Memory Slot

A1 A2 B1 B2

- SR - - 3200

- DR - - 3200

- SR - SR 3200

- DR - DR 3200

SR SR SR SR 2933

SR/DR DR SR/DR DR 2667

SR/DR SR/DR SR/DR SR/DR 2667

SR: Single rank DIMM, 1Rx4 or 1R x8 on DIMM module label

DR: Dua l ran k DIMM, 2Rx4 or 2R x8 on DIMM module label

Frequency

(Mhz)

English

22

e DIMM only ts in one correct orientation. It will cause permanent dam age to
the mothe rboard and the DIMM if you force the DIMM into the slot at incor rect
orientation.

1

2

B550 Pro4

3

English

23

2.4 Expansion Slots (PCI Express Slots)

ere are 4 PCI Express slots on the motherboard.

Before installing an ex pansion card, please make sure that the power supply is
switched o or the power cord is unplugged. Plea se read the documentation of the
expan sion card and mak e necessary hardware settings for the card before you start
the installation.

PCIe slots:

PCIE1 (PCIe 4.0 x16 slot) is used for PCI Express x16 lane width graphics cards.

PCIE2 (PCIe 3.0 x1 slot) is used for PCI Express x1 lane width cards.

PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.

PCIE4 (PCIe 3.0 x1 slot) is used for PCI Express x1 lane width cards.

PCIE1 PCIE3

Ryzen Series CPUs (Matisse) Gen4x16 Gen3x4

Ryzen Series APUs (Renoir) Gen3x16 Gen3x4

For a better ther mal environment, ple ase connect a ch assi s fan to the motherboard’s
chassis fan connector (CHA_ FAN1/WP, CHA_ FA N2/WP, CHA_FAN3/WP or
CHA_ FA N4/WP) when using multiple graphics cards.

English

24

2.5 Jumpers Setup

e illustration shows how jumpers are setup. When the jumper cap is placed on

the pins, the jumper is “Short”. If no jumper cap is placed on the pins, the jumper is

“O pen”.

Clear CMOS Jumper

(CLRCMO S1)

(see p.7, No. 22)

CLRCMOS2 allows you to clear the data in CMOS. To clear and reset the system

parameters to default setup, please turn o the computer and unplug the power

cord from the power supply. Aer waiting for 15 seconds, use a jumper cap to

short the pins on CLRCMOS2 for 5 seconds. However, please do not clear the

CMOS right aer you update the BIOS. If you need to clear the CMOS when you

just nish updating the BIOS, you must boot up the system rst, and then shut it

down before you do the clear-CMOS action. Please be noted that the password,

date, time, and user default prole will be cleared only if the CMOS battery is

removed. Please remember toremove the jumper cap aer clearing the CMOS.

2-pin Jumper

B550 Pro4

25

English

2.6 Onboard Headers and Connectors

Onboard headers and connectors are NOT jumpers. Do NOT place jumper caps over
these header s and connectors. Placing jumper caps over the headers and connectors
will cause permanent damage to the motherboard.

System Panel Header

(9-pi n PANEL1)

(see p.7, No. 19)

PWRBTN (Power Switch):

Connec t to the power switch on the chassi s front panel. You may congure the way to
turn o your system using the power switch.

RESET (Reset Switch):
Connec t to the reset switch on the chassi s front panel. P ress the reset sw itch to restart
the computer if the compute r freezes and fails to perform a normal restart.

PLED (Syste m Power LED):
Connec t to the power status indicator on the chassis front panel. e LED i s on when
the system is ope rating. e LED keeps blinking when the system i s in S3 sleep state.
e LED is o when the system i s in S4 sle ep state or powered o (S5).

HDLED (Ha rd Drive Activity LED):
Connec t to the hard drive ac tivity LED on the chassis front panel. e LED is on when
the hard dr ive is reading or w riting data.

e front panel de sign may dier by chassis. A front pane l module mainly consists
of power switch , reset switch, power LED, hard dr ive activity LED, speak er and etc.
When connecting your chassis front panel module to this head er, make sure the wire
assig nments and the pin assig nments are matched correctly.

1

PLED+

PLED-

HDLED-

HDLED+

PWRBTN#

GND

RESET#

GND

GND

Connect the power

switch, reset switch and

system status indicator on

the chassis to this header

according to the pin

assignments below. Note

the positive and negative

pins before connecting

the cables.

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26

B550 Pro4

PLED-

SPEAKER

Power LED and Speaker

Header

(7-pin SPK_PLED1)

(see p.7, No. 20)

Serial ATA3 Connectors

(SATA3_1:

see p.7, No. 16)

(SATA3_ 2:

see p.7, No. 17)

(SATA3_ 3:

see p.7, No. 14)

(SATA3_4:

see p.7, No. 15)

(SATA3_ 5:

see p.7, No. 12)

(SATA3_ 6:

see p.7, No. 13)

USB 2.0 Headers

(9-pin USB_1_2)

(see p.7, No. 24)

(9-pin USB_3_4)

(see p.7, No. 23)

DUMMY
+5V

1

SATA3_2 SATA3_4 SATA3_6

USB_PWR

1

USB_PWR

DUMMY

PLED+

PLED+

P-

P+

P+

P-

GND

GND

DUMMY

Please connect the

chassis power LED and

the chassis speaker to this

header.

ese six SATA3

connectors support SATA

data cables for internal

SATA3_5

storage devices with up to

6.0 Gb/s data transfer rate.

* M2_ 3 and SATA3_5_6

SATA3_3

share lanes. If either one

of them is in use, the other

one will be disabled.

SATA3_1

ere are two headers

on this motherboard.

Each USB 2.0 header can

support two ports.

USB 3.2 Gen1 Header

(19-pin USB3_7_8)

(see p.7, No. 10)

IntA_PA_SSRX-

IntA_PA_SSRX+

IntA_PA_SSTX-

IntA_PA_SSTX+

IntA_PA_D-

IntA_PA_D+

Vbus

GND

GND

VbusVbus

IntA_PB_SSRX-

IntA_PB_SSRX+

GND

IntA_PB_SSTX-

IntA_PB_SSTX+

GND

IntA_PB_D-

IntA_PB_D+

Dummy

1

ere is one header on

this motherboard. Each

USB 3.2 Gen1 header can

support two ports.

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27

Front Panel Audio Header

GND

FAN_VOLTAGE_CONTROL

FAN_SPEED

FAN_SPEED_CONTROL

GND

FAN_VOLTAGE_CONTROL

FAN_SPEED

FAN_SPEED_CONTROL

FAN_VOLTAGE

(9-pin HD_ AUDIO1)

(see p.7, No. 30)

1. Hig h Denition Audio suppor ts Jack Sensing, but the panel wire on the ch assis must
suppor t HDA to function correc tly. Please follow the instructions in our manual and
chassis manual to install your syste m.

2. If you u se an AC’97 audio panel, please in stall it to the front panel audio header by
the steps below:
A. Connect Mic_IN (MIC) to MIC2_ L.
B. Conne ct Audio_R (RIN) to OUT2_R and Audio_ L (LIN) to OUT2_ L.
C. Connect Ground (GND) to Ground (GND).
D. MIC_ RET and OUT_RET are for the HD audio panel only. You don’t need to
connec t them for the AC’97 audio panel.
E. To activate the front mic, go to the “FrontMic” Tab in the Realtek Control panel
and adjust “Recording Volume”.

1

GND

PRESENCE#

MIC2_R

MIC2_L

MIC_RET

J_SENSE

OUT2_R

OUT_RET

OUT2_L

is header is for

connecting audio devices

to the front audio panel.

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28

Chassis Fan / Waterpump

Fan Connectors

(4-pin CHA_FAN1/WP)

(see p.7, No. 21)

(4-pin CHA_FAN2/WP)

(see p.7, No. 25)

(4-pin CHA_FAN3/WP)

(see p.7, No. 31)

(4-pin CHA_FAN4/WP)

(see p.7, No. 26)

CPU Fan Connector

(4-pin CPU_FAN1)

(see p.7, No. 4)

1

2

3

4

GND

1 2 3 4

CPU_FAN_SPEED

GND

FAN_VOLTAGE

FAN_SPEED

FAN_SPEED_CONTROL

FAN_SPEED_CONTROL

Please connect fan cables

to the fan connectors and

match the black wire to

the ground pin.

is motherboard pro-

vides a 4-Pin CPU fan

(Quiet Fan) connector.

If you plan to connect a

3-Pin CPU fan, please

connect it to Pin 1-3.

B550 Pro4

FAN_VOLTAGE

12

24

1

8 5

CPU Fan / Waterpump

Fan Connector

(4-pin CPU_FAN2/WP)

(see p.7, No. 1)

ATX Power Connector

(24-p i n ATX PWR1)

(see p.7, No. 9)

ATX 12V Power

Connector

(8-pin ATX12V1)

(see p.7, No. 2)

ATX 12V Power

Connector

(4-pin ATX12V2)

(see p.7, No. 3)

GND

1 2 3 4

CPU_FAN_SPEED

FAN_SPEED_CONTROL

13

1

4

is motherboard pro-

vides a 4-Pin CPU fan

(Quiet Fan) connector.

If you plan to connect a

3-Pin CPU fan, please

connect it to Pin 1-3.

is motherboard pro-

vides a 24-pin ATX power

connector. To use a 20-pin

ATX power supply, please

plug it along Pin 1 and Pin

13.

is motherboard

provides a 8-pin ATX 12V

power connector. To use a

4-pin ATX power supply,

please plug it along Pin 1

and Pin 5.

Please connect an ATX

12V power supply to this

connector.

*e power supply plug

ts into this connector in

only one orientation.

Serial Port Header

(9-p in CO M1)

(see p.7, No. 29)

1

RRXD1

DDTR#1

TTXD1

DDCD#1

DDSR#1

CCTS#1

RRTS#1

GND

is COM1 header

supports a serial port

module.

RRI#1

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29

SPI TPM Header

SPI_DQ3

(13 -pi n SPI_T PM _J1)

(see p.7, No. 11)

1

+3.3V

SPI_CS0

SPI_DQ2

TPM_Present

CLK

SPI_MOSI

GND

RSMRST#

SPI_MISO

RST#

TPM_PIRQ

SPI_TPM_CS#

is connector supports SPI

Trusted Platform Module (TPM)

system, which can securely

store keys, digital certicates,

passwords, and data. A TPM

system also helps enhance

network securit y, protects digital

identities, and ensures platform

integrity.

English

RGB LED Headers

(4-p i n RGB_ LED1)

(see p.7, No. 28)

(4-pi n RGB _LED2)

(see p.7, No. 7)

Addressable LED Headers

(3-pin A DDR _LED1)

(see p.7, No. 27)

(3-pin A DDR _LED2)

(see p.7, No. 8)

1

12V GRB

1

12V GRB

RGB headers are used to connect

RGB LED extension cables which

allow users to choose from

various LED lighting eects.

Caution: Never install the

RGB LED cable in the wrong

orientation; otherwise, the cable

may be damaged.

*Please refer to page 54 for

further instructions on this

header.

ese headers are used to connect

Addressable

LED extension ca-

bles which a llow users to choose

from various LED lighting

eects.

Caution: Never install the

Addressable LED cable in the

wrong orientation; otherwise,

the cable may be damaged.

*Please refer to page 55 for

further instructions on this

header.

30

2.7 Post Status Checker

Post Status Checker (PSC) diagnoses the computer when users power on the

machine. It emits a red light to indicate whether the CPU, memory, VGA or stor-

age is dysfunctional. e lights go o if the four mentioned above are functioning

normally.

B550 Pro4

31

English

2.8 CrossFireXTM and Quad CrossFireXTM Operation Guide

is motherboard supports CrossFireXTM and Quad CrossFireXTM that allows you

to install up to two identical PCI Express x16 graphics cards.

1. You should only use identical CrossFireXTM-ready g raphics cards that are AM D
certied.

2. Mak e sure that your graphics card driver supports AMD CrossFireXTM technology.
Download the drivers from the A MD’s website: www.amd.com

3. Mak e sure that your powe r supply unit (PSU) can provid e at least the minimum
power your syste m require s. It is recommended to use a AMD certied PSU. Plea se
refer to the AMD’s website for d etail s.

4. If you pair a 12-pipe CrossFireXTM Edition card with a 16-pipe card, both cards will
operate a s 12-pipe cards while in CrossFireXTM mode.

5. Dierent CrossFireXTM cards may require dierent method s to enable CrossFi­reXTM. Please refer to A MD graphics card manuals for de tailed installation guide.

2.8.1 Installing Two CrossFireXTM-Ready Graphics Cards

Step 1

Insert one graphics card into PCIE1 slot

and the other graphics card to PCIE3 slot.

Make sure that the cards are properly

seated on the slots.

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32

CrossFire Bridge

Step 2

Connect two graphics cards by installing

a CrossFire Bridge on the CrossFire Bridge

Interconnects on the top of the graphics

cards. (e CrossFire Bridge is provided

with the graphics card you purchase, not

bundled with this motherboard. Please

refer to your graphics card vendor for

deta ils .)

Step 3

Connect a VGA cable or a DVI cable to the

monitor connector or the DVI connec-

tor of the graphics card that is inserted to

PCIE1 slot.

B550 Pro4

33

English

2.8.2 Driver Installation and Setup

Step 1

Power on your computer and boot into OS.

Step 2

Remove the AMD drivers if you have any VGA drivers installed in your system.

e Catalyst Unins talle r is an optional download. We recommend using this utility
to uninstall any previously installed Catalyst drivers prior to installation. Pl ease
check A MD’s website for AMD driver update s.

Step 3

Install the required drivers and CATALYST Control Center then restart your

computer. Please check AMD’s website for details.

Step 4

Double-click the AMD Catalyst Control

AMD Catalyst Control Center

Center icon in the Windows® sy stem tray.

Step 5

In the le pane, click Performance and

then AMD CrossFireXTM. en select

Enable AMD CrossFireX and click Apply.

Select the GPU number according to your

graphics card and click Apply.

English

34

B550 Pro4

2.9 M.2_SSD (NGFF) Module Installation Guide (M2_1)

The M.2, a lso known as the Next Generation Form Factor (NGFF), is a small size and

versatile card edge connector that aims to replace mPCIe and mSATA. e Hy per M.2

Socket supports M Key type 2260/2280/22110 M.2 PCI Express module up to Gen4x4 (64

Gb/s) (with Matisse) or Gen3x4 (32 Gb/s) (with Renoir).

Installing the M.2_SSD (NGFF) Module

Step 1

Prepare a M.2_SSD (NGFF) module

and the screw.

3

2

Step 2

Depending on the PCB type and

length of your M.2_SSD (NGFF)

module, nd the corresponding nut

location to be used.

1

ABC

No. 1 2 3

Nut Location A B C

PCB Length 6cm 8cm 11cm

Module Type Type 226 0 Type2 280 Typ e 22 110

English

35

Step 3

2

1

1

Before installing a M.2

(NGFF) SSD module, please

loosen the screws to remove

the M.2 heatsink.

*Please remove the protective

fil ms on t he bo ttom side of

the M.2 heatsink before you

install a M.2 SSD module.

Step 4

Prepare the M.2 stando that comes

with the package. en hand tighten

ABC

o

20

the stando into the desired nut

location on the motherboard. Align

and gently insert the M.2 (NGFF)

SSD module into the M.2 slot. Please

be aware that the M.2 (NGFF) SSD

module only ts in one orientation.

ABC

English

36

Step 5

Tighten the screw with a screwdriver

to secure the module into place.

Please do not overtighten the screw

C

NUT1NUT2

as this might damage the module.

M.2_SSD (NGFF) Module Support List

Vendor Interface P/N

ADATA PCIe3 x4 ASX7000NP-128GT-C
ADATA PCIe3 x4 ASX8000NP-256GM-C
ADATA PCIe3 x4 ASX7000NP-256GT-C
ADATA PCIe3 x4 ASX8000NP-512GM-C
ADATA PCIe3 x4 ASX7000NP-512GT-C
Apacer PCIe3 x4 AP240GZ280
Corsair PCIe3 x4 CSSD-F240GBMP500
Intel PCIe3 x4 SSDPEKKF256G7
Intel PCIe3 x4 SSDPEK KF512G7
Kingston PCIe3 x4 SKC1000/480G
Kingston PCIe2 x4 SH2280S3/480G
OCZ PCIe3 x4 RVD400 -M2280-512G (NVME)
PAT R IOT PCIe3 x4 PH240GPM280SSDR NVME
Plextor PCIe3 x4 PX-128M8PeG
Plextor PCIe3 x4 PX-1T M8 Pe G
Plextor PCIe3 x4 PX-25 6M8Pe G
Plextor PCIe3 x4 PX-512M8PeG
Plextor PCIe PX-G256M6 e
Plextor PCIe PX-G512M6e
Samsung PCIe3 x4 SM961 MZVPW128HEGM (NVM)
Samsung PCIe3 x4 PM961 MZVLW128HEGR (NVME)
Samsung PCIe3 x4 960 EVO (MZ-V6E250) (NVME)
Samsung PCIe3 x4 960 EVO (MZ-V6E250BW) (NVME)
Samsung PCIe3 x4 SM951 (NVME)
Samsung PCIe3 x4 SM951 (MZHPV256HDGL)
Samsung PCIe3 x4 SM951 (MZ HPV512HDGL)
Samsung PCIe3 x4 SM951 (NVME)
Samsung PCIe x4 XP941-512G (MZHPU512HCGL)
SanDisk PCIe S D6PP4M-128G
SanDisk PCIe SD6PP4M-256G
TEAM PCIe3 x4 TM8FP2240 G0C101
TEAM PCIe3 x4 TM8FP2480GC110
WD PCIe3 x4 WDS256G1X0C-00ENX0 (NVME)
WD PCIe3 x4 WDS512G1X0C-00EN X0 (NVM E)

B550 Pro4

For the latest updates of M.2_SSD (NFGG) module support list, please visit our website for

details: http://www.asrock.com

English

37

2.10 M.2 WiFi/BT Module Installation Guide (M2_2)

e M.2, also known as the Next Generation Form Factor (NGFF), is a small size and

versatile card edge connector that aims to replace mPCIe and mSATA. e M.2 Socket (Key

E) supports type 2230 WiFi/BT module.

* e M.2 socket does not support SATA M.2 SSDs.

Installing the WiFi/BT module

Step 1

Prepare a type 2230 WiFi/BT module

and the screw.

Step 2

Find the nut location to be used.

PCB Length: 3cm
Module Type: Type2230

English

38

A

B550 Pro4

Step 3

Gently insert the WiFi/BT module

into the M.2 slot. Please be aware

that the module only ts in one

orientation.

A

o

A

20

Step 4

Tighten the screw with a screwdriver

to secure the module into place.

Please do not overtighten the screw as

this might damage the module.

A

39

English

2.11 M.2_SSD (NGFF) Module Installation Guide (M2_3)

The M.2, a lso known as the Next Generation Form Factor (NGFF), is a small size and

versatile card edge connector that aims to replace mPCIe a nd mSATA. e M.2 Socket

supports type 2242/2260/2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module

up to Gen3 x2 (16 Gb/s).

* M2_ 3 and SATA3_5_6 share lanes. If either one of them is in use, the other one will be
disabled.

Installing the M.2_SSD (NGFF) Module

Step 1

Prepare a M.2_SSD (NGFF) module

and the screw.

English

3

2

Step 2

Depending on the PCB type and

length of your M.2_SSD (NGFF)

module, nd the corresponding nut

location to be used.

1

ABC

No. 1 2 3

Nut Location A B C

PCB Length 4.2cm 6cm 8cm

Module Type Type 224 2 Type2 260 Type 2 280

40

B550 Pro4

Step 3

Move the stando based on the

module type and length.

ABC

ABC

ABC

o

20

e stando is placed at the nut

location C by default. Skip Step 3

and 4 and go straight to Step 5 if you

are going to use the default nut.

Otherwise, release the stando by

hand.

Step 4

Peel o the yellow protective lm on

the nut to be used. Hand tighten the

stando into the desired nut location

on the motherboard.

Step 5

Gently insert the M.2 (NGFF) SSD

module into the M.2 slot. Please

be aware that the M.2 (NGFF) SSD

module only ts in one orientation.

ABC

English

41

Step 6

Tighten the screw with a screwdriver

to secure the module into place.

Please do not overtighten the screw

C

NUT1NUT2

as this might damage the module.

M.2_SSD (NGFF) Module Support List

Vendor Interface P/N

Intel PCIe INTEL 6000P-SSDPEKKF256G7 (nvme)
Intel PCIe INTEL 6000P-SSDPEKKF512G7 (nvme)
Intel PCIe INTEL 600P-SSDPEKKW256G7-256GB (nvme)
Kingston PCIe Kingston SHPM2280P2 / 240G (Gen2 x4)
SanDisk PCIe SanDisk-SD6PP4M-128G(Gen2 x2)
Samsung PCIe Samsung XP941-MZHPU512HCGL(Gen2x4)

For the latest updates of M.2_SSD (NFGG) module support list, please visit our website for

details: http://www.asrock.com

English

42

Chapter 3 Software and Utilities Operation

3.1 Installing Drivers

e Support CD that comes with the motherboard contains necessary drivers and

useful utilities that enhance the motherboard’s features.

Running The Support CD

To begin using the support CD, insert the CD into your CD-ROM drive. e CD

automatically displays the Main Menu if “AUTORUN” is enabled in your computer.

If the Main Menu does not appear automatically, locate and double click on the le

“ASRSETUP.EXE” in the Support CD to display the menu.

Drivers Menu

e drivers compatible to your system will be auto-detected and listed on the

support CD driver page. Please click Install All or follow the order from top to

bottom to install those required drivers. erefore, the drivers you install can work

properly.

Utilities Menu

e Utilities Menu shows the application soware that the motherboard supports.

Click on a specic item then follow the installation wizard to insta ll it.

B550 Pro4

43

English

3.2 ASRock Motherboard Utility (A-Tuning)

ASRock Motherboard Utilit y (A-Tuning) is ASRock’s multi purpose soware suite

with a new interface, more new features and improved utilities.

3.2.1 Installing ASRock Motherboard Utility (A-Tuning)

ASRock Motherboard Utilit y (A-Tuning) can be downloaded from ASRock Live

Update & APP Shop. Aer the installation, you will nd the icon “ASRock Mother-

board Utility (A-Tuning)“ on your desktop. Double-click the “ASRock Motherboard

Ut il it y (A -Tu ni ng)“ icon, ASRock Motherboard Utility (A-Tuning) main menu

will pop up.

3.2.2 Using ASRock Motherboard Utility (A-Tuning)

ere are ve sections in ASRock Motherboard Utility (A-Tuning) main menu:

Operation Mode, OC Tweaker, System Info, FAN-Tastic Tuning and Settings.

Operation Mode

Choose an operation mode for your computer.

English

44

OC Tw eaker

Congurations for overclocking the system.

B550 Pro4

System Info

View information about the system.

*e System Browser tab may not appear for certain models.

English

45

FAN-Tastic Tuning

Congure up to ve dierent fan speeds using the graph. e fans will automatically shi

to the next speed level when the assigned temperature is met.

Settings

Congure ASRock Motherboard Utility (A-Tuning). Click to select "Auto run

at Windows Startup" if you want ASRock Motherboard Utility (A-Tuning) to be

launched when you start up the Windows operating system.

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46

3.3 ASRock Live Update & APP Shop

e ASRock Live Update & APP Shop is an online store for purchasing and

downloading soware applications for your ASRock computer. You can quick ly and

easily insta ll various apps and support utilities. With ASRock Live Update & APP

Shop, you can optimize your system and keep your motherboard up to date simply

with a few clicks.

Double-click on your desktop to access ASRock Live Update & APP Shop
utility.

*You need to be connected to the Internet to download apps f rom the ASRock Live Update & APP Shop.

3.3.1 UI Overview

Category Panel

Hot News

B550 Pro4

Information Panel

Category Panel: e category panel contains several category tabs or buttons that

when selected the information panel below displays the relative information.

Information Panel: e information panel in the center displays data about the

currently selected category and allows users to perform job-related tasks.

Hot News: e hot news section displays the various latest news. Click on the image

to visit the website of the selected news and know more.

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47

3.3.2 Apps

When the "Apps" tab is selected, you will see all the available apps on screen for you

to download.

Installing an App

Step 1

Find the app you want to install.

e most recommended app appears on the le side of the screen. e other various

apps are shown on the right. Please scroll up and down to see more apps listed.

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48

You can check the price of the app and whether you have already intalled it or not.

- e red icon displays the price or "Free" if the app is free of charge.

- e green "Installed" icon means the app is installed on your computer.

Step 2

Click on the app icon to see more details about the selected app.

Step 3

If you want to install the app, click on the red icon to start downloading.

Step 4

When installation completes, you can nd the green "Installed " icon appears on the

upper right corner.

B550 Pro4

To uninstall it, simply click on the trash can icon .
*e trash icon may not appear for certain apps.

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49

Upgrading an App

You can only upgrade the apps you have already installed. When there is an

available new version for your app, you will nd the mark of "New Version"

appears below the installed app icon.

Step 1

Click on the app icon to see more details.

Step 2

Click on the yellow icon to start upgrading.

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50

3.3.3 BIOS & Drivers

Installing BIOS or Drivers

When the "BIOS & Drivers" tab is selected, you will see a list of recommended or

critical updates for the BIOS or drivers. Please update them all soon.

B550 Pro4

Step 1

Please check the item information before update. Click on to see more details.

Step 2

Click to select one or more items you want to update.

Step 3

Click Update to start the update process.

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51

3.3.4 Setting

In the "Setting" page, you can change the language, select the server location, and

determine if you want to automatically run the ASRock Live Update & APP Shop

on Windows startup.

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52

B550 Pro4

3.4 Nahimic Audio

Nahimic audio soware provides an incredible high denition sound technology which

boosts the audio and voice performance of your system. Nahimic Audio interface is

composed of four tabs: Audio, Microphone, Sound Tracker and Settings.

ere are four functions in Nahimic audio :

No. Function Description

From this tab, you can mute the current audio device, choose

1

Microphone

2

3

4

Audio

Sound

Tracker

Settings

between four factory audio proles, turn all audio eects
on/o, restores the current prole to its default settings and
access Surround Sound and various features.

From this tab, you can mute the current mic device, choose
between two factory mic proles, turn/o all microphone
eects, restore the current prole to its default settings, and
access Static Noise Suppression and various features.

e Sound Tracker provides a visual indication localizing
the sources of the sounds while in a game. ese are
represented by dynamic segments pointing the direction
of the sounds: the more opaque they are, the stronger the
sounds are.

From this tab, you can access all settings and information of
the soware.

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3.5 ASRock Polychrome SYNC

12V GRB

12V GRB

ASRock Polychrome SYNC is a lighting control utility specically designed for unique indi-

viduals with sophisticated tastes to build their own stylish colorful lighting system. Simply by

connecting the LED strip, you can customize various lighting schemes and patterns, including

Static, Breathing, Strobe, Cycling, Music, Wave and more.

Connecting the LED Strip

Connect your RGB LED strips to the

motherboard.

RGB LED Headers (RGB_LED1 / RGB_LED2)

RGB_LED2

1

RGB_LED1

1

CPU

DRAM

VGA

BOOT

on the

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1

B

R

G

V

2

1

1. Ne ver ins tall the RGB LED cable in the wrong orientation; otherwise, the cable
may be damaged.

2. Before installing or remov ing your RGB L ED cable, please powe r o your system
and unplug the powe r cord from the powe r supply. Failure to do so may cause dam­ages to motherboard components.

1. Please note that the RGB LED str ips do not come with the pack age.

2. e RGB LED head er supports s tandard 5050 RGB LED strip (12V/G/R/B), with a
maximum power rating of 3A (12V) and length within 2 meters.

Connecting the Addressable RGB LED Strip

Connect your

ADDR _LED2)

Addressable RGB LED

on the motherboard.

strips to the

CPU

DRAM

VGA

BOOT

Addressable LED Headers (ADDR_LED1 /

ADDR_LED2

1

GND

DO_ADDR

VOUT

ADDR_LED1

1

GND

DO_ADDR

VOUT

B550 Pro4

1

1. Ne ver ins tall the RGB LED cable in the wrong orientation; otherwise, the cable may be
damaged.

2. Before installing or remov ing your RGB L ED cable, please powe r o your system and
unplug the power cord from the power supply. Failure to do so may cause damages to
motherboard components.

1. Please note that the RGB LED str ips do not come with the pack age.

2. e RGB LED head er supports WS2812B addre ssable RGB LED str ip (5V/Data/

GND), with a ma ximum power rating of 3A (5V) and length w ithin 2 meters.

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ASRock Polychrome SYNC Utility

Now you can adjust the RGB LED color through the ASRock Polychrome SYNC Utility.

Download this utility from the ASRock Live Update & APP Shop and start coloring your

PC style your way!

Drag the tab to customize your

preference.

Toggle on/o the

RGB LED switch

Sync RGB LED eects

for all LED regions of

the motherboard

Select a RGB LED light eect

from the drop-down menu.

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56

Chapter 4 UEFI SETUP UTILITY

4.1 Introduction

is section explains how to use the UEFI SETUP UTILITY to congure your

system. You may run the UEFI SETUP UTILITY by pressing <F2> or <Del> right

aer you power on the computer, other wise, the Power-On-Self-Test (POST) will

continue with its test routines. If you wish to enter the UEFI SETUP UTILITY aer

POST, restart the system by pressing <Ctl> + <Alt> + <Delete>, or by pressing the

reset button on the system chassis. You may also restart by turning the system o

and then back on.

Becau se the UEFI soware is constantly being upd ated, the following UEFI setup
screens and de scriptions are for reference purpose only, and they may not exactly
match what you see on your scre en.

4.1.1 UEFI Menu Bar

e top of the screen has a menu bar with the following selections:

B550 Pro4

Main

OC Tweaker

Advanced

Tool

H/W Monitor

Security

Boot

Exit

For setting system time/date information

For overclocking congurations

For advanced system congurations

Useful tools

Displays current hardware status

For security settings

For conguring boot settings and boot priority

Exit the current screen or the UEFI Setup Utility

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4.1.2 Navigation Keys

Use < > key or < > key to choose among the selections on the menu bar, and

use < > key or < > key to move the cursor up or down to select items, then

press <Enter> to get into the sub screen. You can also use the mouse to click your

required item.

Please check the following table for the descriptions of each navigation key.

Navigation Key(s) Description

+ / -

<Tab>

<PGUP>

<PGDN>

<HOME>

<END>

<F1>

<F7>

<F9>

<F10>

<F12>

<ESC>

To change option for the selected items

Switch to next function

Go to the previous page

Go to the next page

Go to the top of the screen

Go to the bottom of the screen

To display the General Help Screen

Discard changes and exit the SETUP UTILITY

Load optimal default values for all the settings

Save changes and exit the SETUP UTILITY

Print screen

Jump to the Exit Screen or exit the current screen

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4.2 Main Screen

When you enter the UEFI SETUP UTILITY, the Main screen will appear and

display the system overview.

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4.3 OC Tweaker Screen

In the OC Tweaker screen, you can set up overclocking features.

Becau se the UEFI soware is constantly being upd ated, the following UEFI setup
screens and de scriptions are for reference purpose only, and they may not exactly
match what you see on your scre en.

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Overclock Mode(Bus Speed)

Select the overclock mode. Warning! When overclocking also the PCIe, PCI, SATA and

USB busses will be overcloked which may cause instability or failure. Please install an

operating system and the drivers required before overclocking, or else your HDD's may be

undetectable. Overclocking is not supported if the monitor is connected via the onboard

D-Bus/VGA connector.

CPU Frequency and Voltage(VID) Change

If this item is set to [Manual], the multiplier and voltage will be set based on user selection.

Final result is depending on the CPU's capability.

CPU Core (Per CCX)

CPU Voltage

Species a custom CPU core voltage (mV), Should be combined with a custom CPU core

B550 Pro4

frequency. Power saving features for idle cores (e.g. cc6 sleep) remain active.

CCD0

CCX0 Frequency (MHz)

Use this item to adjust CCX0 Frequency.

CCX1 Frequency (MHz)

Use this item to adjust CCX1 Frequency.

CCD1

CCX0 Frequency (MHz)

Use this item to adjust CCX0 Frequency.

CCX1 Frequency (MHz)

Use this item to adjust CCX1 Frequency.

Soc/Uncore OC Voltage(VID)

Specify the SoC/Uncore voltage (VDD_SOC) in mV to support memory and Innity Fabric

overclocking. VDD_SOC also determines the GPU voltage on processors with integrated

graphics. “SoC/Uncore OC Mode” needs to be enabled to force this voltage.

CLD0 VDDP Voltage Control

AMD Overclocking Setup VDDP is a voltage for the DDR4 bus signaling (PHY), and it is

derived from your DRAM Voltage (VDDIO_Mem). As a result, VDDP voltage in mV can

approach but not exceed your DRAM Voltage.

CLD0 VDDG CCD Voltage Control

AMD Overclocking Setup VDDG CCD represents voltage for the data portion of the Innity

Fabric. It is derived from the CPU SoC/Uncore Voltage (VDD_SOC). VDDG can approach

but not exceed VDD_SOC.

CLD0 VDDG IOD Voltage Control

AMD Overclocking Setup VDDG IOD represents voltage for the data portion of the Innity

Fabric. It is derived from the CPU SoC/Uncore Voltage (VDD_SOC). VDDG can approach

but not exceed VDD_SOC.

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DRAM Information

DRAM Frequency

If [Auto] is selected, the motherboard will detect the memory module(s) inserted

and assign the appropriate frequency automatically. Setting DRAM Frequency can

adjust DRAM Timing.

DRAM Voltage

Congure the voltage for the DRAM Voltage.

Innity Fabric Frequency and Dividers

AMD Overclocking Setup Set Innity Fabric frequency (FCLK). Auto: FCLK =

MCLK. Manual: FCLK must be less than or equal to MCLK for best performance in

most cases. Latency penalties are incurred if FCLK and MCLK are mismatched, but

suciently high MCLK can negate or overcome this penalty.

DRAM Timing Conguation

External Voltage Settings and Load-line Calibration

CPU Vcore Voltage

Input voltage for the processor by the external voltage regulator.

CPU Load-Line Calibration

CPU Load-Line Calibration helps prevent CPU voltage droop when the system is

under heav y loading.

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VDDCR_SOC Voltage

Input voltage for the processor by the external voltage regulator.

VDDCR_SOC Load-Line Calibration

VDDCR_SOC Load-Line Calibration helps prevent VDDCR_SOC voltage droop

when the system is under heavy loading.

VPPM

Congure the voltage for the VPPM.

2.50V Voltage

Congure the voltage for the 2.50V PROM Voltage.

+1.8V Voltage

Congure the voltage for the +1.8V Voltage. e default value is [Auto].

VDDP

Congure the voltage for the VDDP.

Chipset 1.05V Voltage

Congure the voltage for the Chipset 1.05V Voltage.

Save User Default

Type a prole name and press enter to save your settings as user default.

Load User Default

Load previously saved user defaults.

Save User UEFI Setup Prole to Disk

It helps you to save current UEFI settings as an user prole to disk.

Load User UEFI Setup Prole from Disk

You can load previous saved prole from the disk.

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4.4 Advanced Screen

In this section, you may set the congurations for the following items: CPU

Conguration, Onboard Devices Conguration, Storage Conguration, ACPI Con-

guration, Trusted Computing, AMD CBS, AMD PBS and AMD Overclocking.

Setting wrong values in this sec tion may cause the system to malfunction.

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UEFI Conguration

Active Page on Entry

Select the default page when entering the UEFI setup utility.

Full HD UEFI

When [Auto] is selected, the resolution will be set to 1920 x 1080 if the monitor

supports Full HD resolution. If the monitor does not support Full HD resolution,

then the resolution will be set to 1024 x 768. When [Disable] is selected, the

resolution will be set to 1024 x 768 directly.

4.4.1 CPU Conguration

PSS Support

Use this to enable or disable the generation of ACPI_PPC, _PSS, and _PCT objects.

B550 Pro4

NX Mode

Use this to enable or disable NX mode.

SVM Mode

When this is set to [Enabled], a VMM (Virtual Machine Architecture)can utilize the

additional hardware capabilities provided by AMD-V. e default value is [Enabled].

Coniguration options: [Enabled] and [Disabled].

SMT Mode

is item can be used to disable symmetric multithreading. To re-enable SMT, a

power cycle is needed aer selecting [Auto].

Warning: S3 is not supported on systems where SMT is disabled.

AMD fTPM Switch

Use this to enable or disable AMD CPU fTPM.

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4.4.2 Onboard Devices Conguration

Turn On LED in S5

Turn on LED in the ACPI S5 state.

SR-IOV Support

Enable/disable the SR-IOV (Single Root IO Virtualization Support) if the system

has SR-IOV capable PCIe devices.

Gnb HD Audio

Enable/disable onboard HD audio. Set to Auto to enable onboard HD audio and

automatically disable it when a sound card is installed.

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Front Panel

Enable/disable front panel HD audio.

Restore on AC/Power Loss

Select the power state aer a power failure. If [Power O] is selected, the power will

remain o when the power recovers. If [Power On] is selected, the system will start

to boot up when the power recovers.

WAN Radio

Congure the WiFi module's connectivity.

BT On/O

Enable/disable the bluetooth.

PS2 Y- Cable

Enable the PS2 Y-Cable or set this option to Auto.

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4.4.3 Storage Conguration

SATA M o de

AHCI: Supports new features that improve performance.

RAID: Combine multiple disk drives into a logical unit.

SATA Hot Plug

Enable/disable the SATA Hot Plug function.

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NVMe Conguration

NVMe Device Options Settings.

4.4.4 ACPI Conguration

Suspend to RAM

It is recommended to select auto for ACPI S3 power saving.

B550 Pro4

Deep Sleep

Congure deep sleep mode for power saving when the computer is shut down.

PS/2 Keyboard S4/S5 Wakeup Support

Allow the system to be waked up by a PS/2 Keyboard in S4/S5.

USB Keyboard/Mouse Power On

Allow the system to be waked up by an USB Keyboard/Mouse device.

PCIE Devices Power On

Allow the system to be waked up by a PCIE device and enable wake on LAN.

RTC Alarm Power On

Allow the system to be waked up by the rea l time clock alarm. Set it to By OS to let

it be handled by your operating system.

USB Power Delivery in Soft O State (S5)

If this option is enabled, the USB port will provide power to your devices even when

the system is in Power State S5.

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4.4.5 Trusted Computing

Security Device Support

Enable or disable BIOS support for security device.

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4.4.6 AMD CBS

e AMD CBS menu accesses AMD specic features.

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4.4.7 AMD PBS

e AMD PBS menu accesses AMD specic features.

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4.4.8 AMD Overclocking

e AMD Overclocking menu accesses options for conguring CPU frequency and

voltage.

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4.5 Tools

Easy RAID Installer

Easy R AID Installer helps you to copy the R AID driver from the support CD to

your USB storage device. Aer copying the drivers please change the SATA mode to

RAID, then you can start installing the operating system in RAID mode.

SSD Secure Erase Tool

Use this tool to securely erase SSD.

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NVME Sanitization Tool

Aer you sanitize SSD, all user data will be permantly destroyed on the SSD and

cannot be recovered.

Instant Flash

Save UEFI les in your USB storage device and run Instant Flash to update your

UEFI.

4.6 Hardware Health Event Monitoring Screen

is section allows you to monitor the status of the hardware on your system,

including the parameters of the CPU temperature, motherboard temperature, fan

speed and voltage.

B550 Pro4

CPU FAN1 Setting

Select a fan mode for CPU Fan 1, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

CPU FAN1 Temp Source

Select a fan temperature source for CPU Fan 1.

FAN Conguration

CPU_FAN2/WP Switch

Select CPU Water Pump mode.

CPU Fan 2 Control Mode

Select PWM mode or DC mode for CPU Fan 2 .

CPU Fan 2 Setting

Select a fan mode for CPU Fan 2, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

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CPU Fan 2 Temp Source

Select a fan temperature source for CPU Fan 2.

CHA_FAN1/WP Switch

Select CHA_FAN1 or Water Pump mode.

Chassis Fan 1 Control Mode

Select PWM mode or DC mode for Chassis Fan 1 .

Chassis Fan 1 Setting

Select a fan mode for Chassis Fan 1, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

Chassis Fan 1 Temp Source

Select a fan temperature source for Chassis Fan 1.

CHA_FAN2/WP Switch

Select CHA_FAN2 or Water Pump mode.

Chassis Fan 2 Control Mode

Select PWM mode or DC mode for Chassis Fan 2 .

Chassis Fan 2 Setting

Select a fan mode for Chassis Fan 2, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

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Chassis Fan 2 Temp Source

Select a fan temperature source for Chassis Fan 2.

CHA_FAN3/WP Switch

Select CHA_FAN3 or Water Pump mode.

Chassis Fan 3 Control Mode

Select PWM mode or DC mode for Chassis Fan 3 .

Chassis Fan 3 Setting

Select a fan mode for Chassis Fan 3, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

B550 Pro4

Chassis Fan 3 Temp Source

Select a fan temperature source for Chassis Fan 3.

CHA_FAN4/WP Switch

Select CHA_FAN4 or Water Pump mode.

Chassis Fan 4 Control Mode

Select PWM mode or DC mode for Chassis Fan 4.

Chassis Fan 4 Setting

Select a fan mode for Chassis Fan 3, or choose Customize to set 5 CPU temperatures

and assign a respective fan speed for each temperature.

Chassis Fan 4 Temp Source

Select a fan temperature source for Chassis Fan 4.

Fan-Tastic

Select a fan mode for Fan, or choose Customize to set 5 CPU temperatures and assign a

respective fan speed for each temperature.

FanTuni n g

Detect the lowest fan speed in the system. Iy may ta ke 3-5 minutes to complete.

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4.7 Security Screen

In this section you may set or change the supervisor/user password for the system.

You may also clear the user password.

Supervisor Password

Set or change the password for the administrator account. Only the administrator

has authority to change the settings in the UEFI Setup Utility. Leave it blank and

press enter to remove the password.

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User Password

Set or change the password for the user account. Users are unable to change the

settings in the UEFI Setup Utility. Leave it blank and press enter to remove the

password.

Secure Boot

Enable to support Secure Boot.

4.8 Boot Screen

is section displays the available devices on your system for you to congure the

boot settings and the boot priority.

Boot From Onboard LAN

Allow the system to be waked up by the onboard LAN.

B550 Pro4

Setup Prompt Timeout

Congure the number of seconds to wait for the setup hot key.

Fast Boot

Fast Boot minimizes your computer's boot time. In fast mode you may not boot

from an USB storage device.

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CSM (Compatibility Support Module)

CSM

Enable to launch the Compatibility Support Module. Please do not disable unless

you’re running a WHCK test.

Above 4G Decoding

Enable or disable 64bit capable Devices to be decoded in Above 4G Address Space

(only if the system supports 64 bit PCI decoding).

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Launch PXE OpROM Policy

Select UEFI only to run those that support UEFI option ROM only. Select Legacy

only to run those that support legacy option ROM only. Select Do not launch to not

execute both legacy and UEFI option ROM.

Launch Storage OpROM Policy

Select UEFI only to run those that support UEFI option ROM only. Select Legacy

only to run those that support legacy option ROM only. Select Do not launch to not

execute both legacy and UEFI option ROM.

Bootup Num-Lock

Select whether Num Lock should be turned on or o when the system boots up.

Full Screen Logo

Enable to display the boot logo or disable to show normal POST messages.

AddOn ROM Display

Enable AddOn ROM Display to see the AddOn ROM messages or congure the Ad-

dOn ROM if you’ve enabled Full Screen Logo. Disable for faster boot speed.

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4.9 Exit Screen

Save Changes and Exit

When you select this option the following message, “Save conguration changes

and exit setup?” will pop out. Select [OK] to save changes and exit the UEFI SETUP

UTILITY.

Discard Changes and Exit

When you select this option the following message, “Discard changes and exit

setup?” will pop out. Select [OK] to exit the UEFI SETUP UTILITY without saving

any changes.

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Discard Changes

When you select this option the following message, “Discard changes?” will pop

out. Select [OK] to discard all changes.

Load UEFI BIOS Defaults

Load UEFI BIOS Default values for all the setup questions. e F9 key can be used

for this operation.

Contact Information

If you need to contact ASRock or want to know more about ASRock, you’re welcome

to visit ASRock’s website at http://ww w.asrock.com; or you may contact your dealer

for further information. For technical questions, please submit a support request

form at http://www.asrock.com/support/tsd.asp

ASRock Incorporation

2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District,

Taipei City 112, Taiwan (R.O.C.)

ASRock EUROPE B.V.

Bijsterhuizen 11-11

6546 AR Nijmegen

e Netherlands

Phone: [phone]

Fax: [phone]

ASRock America, Inc.

13848 Magnolia Ave, Chino, CA91710

U.S.A.

Phone: [phone]

Fax: [phone]

DECLARATION OF CONFORMITY

Per FCC Part 2 Section 2.1077(a)

Responsible Party Name: ASRock Incorporation

Address:

Phone/FaxNo:

hereby declares that the product

Product Name : Motherboard

13848 Magnolia Ave, Chino, CA91710

[phone]/[phone]

Model Number :

Conforms to the following specications:

FCC Part 15, Subpart B, Unintentional Radiators

Supplementary Information:

B550 Pro4

is device complies with part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) is device may not cause harmful interference,

and (2) this device must accept any interference received, including interference

that may cause undesired operation.

James

Representative Person’s Name:

Signature :

Date :

May 12, 2017

EU Declaration of Conformity

EMC —Directive 2014/30/EU (from April 20th, 2016)

☐

For the following equipment:

Motherboard

(Product Name)

B550 Pro4 / ASRock

(Model Designation / Trade Name)

ASRock Incorporation

(Manufacturer Name)

2F., No.37, Sec. 2, Jhongyang S. Rd., Beitou District, Taipei City 112, Taiwan (R.O.C.)

(Manufacturer Address)

ڛ

☐ EN 55022:2010/AC:2011 Class B EN 55024:2010/A1:2015

ڛ EN 55032:2012+AC:2013 Class B ڛڛ EN 61000-3-3:2013
ڛ EN 61000-3-2:2014

☐

LVD —Directive 2014/35/EU (from April 20th, 2016)

EN 60950-1 : 2011+ A2: 2013 ☐

ڛ RoHS — Directive 2011/65/EU
ڛ CE marking

EN 60950-1 : 2006/A12: 2011

(EU conformity marking)

ASRock EUROPE B.V.

(Company Name)

Bijsterhuizen 1111 6546 AR Nijmegen e Netherlands

(Company Address)

Person responsible for making this declaration:

(Name, Surname)

A.V.P

(Position / Title)

May 29, 2020

(Date)

P/N: 15G062225000AK V1.0