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 identification or explanation and to the owners’ benefit, without intent to

infringe.

Disclaimer:

Specifications 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 fitness for a particular purpose.

In no event shall ASRock, 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 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.

This 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

The 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 www.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)

The terms HDMI® and HDMI High-Definition 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	Specifications	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 Configuration	65
4.4.2	Onboard Devices Configuration	66
4.4.3	Storage Configuration	68
4.4.4	ACPI Configuration	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

B550 Pro4

Chapter 1 Introduction

Thank 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

software and utilities. Chapter 4 contains the configuration guide of the BIOS setup.

Because the motherboard specifications and the BIOS software might be updated, the content of this manual will be subject to change without notice. In case any modifications of this manual occur, the updated version will be available on ASRock’s website without further notice. If you require technical support related to this motherboard, please visit our website for specific information about the model you are using. You may find the latest VGA cards and CPU support list on ASRock’s website as 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 Standoff for M.2 Socket (Optional)

•1 x I/O Panel Shield

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1.2 Specifications

Platform	•	ATX Form Factor
	•	Solid Capacitor design
	•	2oz Copper PCB
CPU	•	Supports 3rd Gen AMD AM4 Ryzen™ / future AMD Ryzen™
		Processors (3000 and 4000 Series Processors)*
	* Not compatible with AMD Ryzen™ 5 3400G and Ryzen™ 3
	3200G.
	•	Digi Power design
	• 8 Power Phase design
Chipset	•	AMD B550
Memory	•	Dual Channel DDR4 Memory Technology

• 4 x DDR4 DIMM Slots

• AMD Ryzen series CPUs (Matisse) support DDR4 4533+(OC) /4466(OC)/4400(OC)/4333(OC)/4266(OC)/4200(OC)/ 4133(OC)/4000(OC)/3866(OC)/3800(OC)/3733(OC)/ 3600(OC)/3466(OC)/3200/2933/2667/2400/2133 ECC & nonECC, un-buffered memory*

• AMD Ryzen series APUs (Renoir) support DDR4 4733+(OC) /4666(OC)/4600(OC)/4533(OC)/4466(OC)/4400(OC)/4333 (OC)/4266(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-buffered memory*

* 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.

• Max. capacity of system memory: 128GB

• Supports Extreme Memory Profile (XMP) memory modules

• 15μ Gold Contact in DIMM Slots

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B550 Pro4

Expansion	AMD Ryzen series CPUs (Matisse)
Slot	• 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 CrossFireXTM
	• 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT module
Graphics	• Integrated AMD RadeonTM Vega Series Graphics in Ryzen
	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.
	* The 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 Microsoft PlayReady®

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English

Audio	•	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
LAN	•	PCIE x1 Gigabit LAN 10/100/1000 Mb/s
	•	Realtek RTL8111H
	• Supports Wake-On-LAN
	•	Supports Lightning/ESD Protection
	• Supports Energy Efficient Ethernet 802.3az
	•	Supports PXE
Rear Panel	•	Antenna Bracket
I/O	•	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-
		tection)
	• 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD Pro-
		tection)
	• 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
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 type 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 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)**

**Supports NVMe SSD as boot disks

**Supports ASRock U.2 Kit

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B550 Pro4

Connector	•	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)
	* The CPU Fan Connector supports the CPU fan of maximum
	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)
	* The 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	•	AMI UEFI Legal BIOS with GUI support
Feature	•	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

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Hardware	• Temperature Sensing: CPU, CPU/Water Pump, Chassis/Wa-
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
OS	• Microsoft® Windows® 10 64-bit
Certifica-	• FCC, CE
tions	• ErP/EuP ready (ErP/EuP ready power supply is required)

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

Please realize that there is a certain risk involved with overclocking, including adjusting the setting in the BIOS, applying Untied Overclocking Technology, or using thirdparty overclocking tools. Overclocking may affect your system’s stability, or even cause damage to the components and devices of your system. It should be done at your own risk and expense. We are not responsible for possible damage caused by overclocking.

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B550 Pro4

1.3 Motherboard Layout

1

2

3

4

5

6

	USB: USB3T: US3 32 .B Gen2 1 1		/Mous Keyboard PS2 e

HDMI1

VGA1

USB 3.2 Gen2

T:USB31_TA_1

B: USB31_TC_1

	USB 3.2 Gen1			Top:
	T: USB3_5			RJ-45
	B: USB3_6
	INMI Bottom C :		FRON Center: T		LINE Top:

31

CT1

SUPER

I/O

		RGB_LED2
	1	7
CPU_FAN2/WP	CPU_FAN1	ADDR_LED2
ATX12V1	1	8
	ATX12V2

AM4 SOCKET

288-pinmodule)

288-pinmodule)

288-pinmodule)

288-pinmodule)

bit,

bit,

bit,

bit,

DDR4A1(64

DDR4A2(64

DDR4B1(64

DDR4B2(64

ATXPWR1

9

CHA_FAN3/WP

SPI_TPM_J1

1

7 8

10

PCIE1

USB3

Hyper M.2

CT2 CT3

	RoHS	_2
		M2
	M2_WIFI_CT1
	PCIE2

PCIE3

M2_1

PCIe Gen4 x4

CT8

AMD

B550

SATA3 6	SATA3 5
SATA3 4	SATA3 3
SATA3 2	SATA3 1

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12

13

14

15

16

17

CMOS			3
Battery
CT5	CT6	CT7	M2	CT8	CPU	18
					VGA
					DRAM
AUDIO					BOOT
CODEC

PCIE4

		COM1	CHA_FAN4/WP			CHA_FAN1/WP SPK_PLED1	PANEL1
	HD_AUDIO1	RGB_LED1	CHA_FAN2/WP USB_1_2	USB_3_4			PLED PWRBTN
			ADDR_LED1		CLRMOS1
		1
1	1	1	1	1	1	1	1

HDLED RESET

30 29 28 27 26 25 24 23 22 21 20 19

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No. Description

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

2ATX 12V Power Connector (ATX12V1)

3ATX 12V Power Connector (ATX12V2)

4CPU Fan Connector (CPU_FAN1)

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

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

7RGB LED Header (RGB_LED2)

8Addressable LED Header (ADDR_LED2)

9ATX 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 Connector (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)
	English
		31	Chassis Fan / Waterpump Fan Connector (CHA_FAN3/WP)

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B550 Pro4

1.4 I/O Panel

				5
1	2	3	4	6

		12					11		10		9												8				7
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)
3		USB 3.2 Gen2 Type-A Port (USB31_								9	USB 3.2 Gen2 Type-C Port (USB31_
		TA_1)									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)

*There 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 Port
Activity / Link LED				Speed LED
Status		Description		Status		Description
Off		No Link		Off		10Mbps connection
Blinking		Data Activity		Orange		100Mbps connection
On		Link		Green		1Gbps connection

** Function of the Audio Ports in 7.1-channel Configuration:

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

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Chapter 2 Installation

This is an ATX form factor motherboard. Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits 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 overtighten the screws! Doing so may damage the motherboard.

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B550 Pro4

2.1 Installing the CPU

Unplug all power cables before installing the CPU.

1

90o

2

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3

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B550 Pro4

2.2 Installing the CPU Fan and Heatsink

After 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. Make sure that the CPU and the heatsink are securely fastened and in good contact with each other.

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

Installing the CPU Box Cooler SR1

1

2

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13

3

4

English

	N1
FA
U_
CP

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B550 Pro4

Installing the AM4 Box Cooler SR2

1

2

English

15

3

English

16

B550 Pro4

4

	N1
FA
_
PU
C

*The diagrams shown here are for reference only. The header might be in a different position on your motherboard.

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Installing the AM4 Box Cooler SR3

1

2

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B550 Pro4

3

4

English

19

5

	1
N
_FA
PU
C

6

	1
	N
FA
_
PU
C

English

		2
+12V		ED
		L
	_
	B
	RG

*The diagrams shown here are for reference only. The header might be in a different position on your motherboard.

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B550 Pro4

2.3 Installing Memory Modules (DIMM)

This motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots, and supports Dual Channel Memory Technology.

1.For dual channel configuration, you always need to install identical (the same brand, speed, size and chip-type) DDR4 DIMM pairs.

2.It is unable to activate Dual Channel Memory Technology with only one or three memory module installed.

3.It is not allowed to install a DDR, DDR2 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):

	UDIMM Memory Slot			Frequency
A1	A2	B1	B2	(Mhz)
-	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

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Ryzen Series APUs (Renoir):

	UDIMM Memory Slot			Frequency
A1	A2	B1	B2	(Mhz)
-	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 1Rx8 on DIMM module label DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label

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