ASUS Prime B550-Plus Service Manual

PRIME

B550-PLUS

Motherboard

E16536
First Edition

May 2020

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ii

Contents

Safety information ...................................................................................................... iv

About this guide .......................................................................................................... v

Package contents ....................................................................................................... vi

PRIME B550-PLUS specications summary ........................................................... vi

Connectors with shared bandwidth .......................................................................... x

Chapter 1 Product introduction

1.1 Before you proceed ...................................................................................... 1-1

1.2 Motherboard overview ................................................................................. 1-1

1.3 Central Processing Unit (CPU) .................................................................... 1-9

1.4 System memory .......................................................................................... 1-10

1.5 M.2 installation ............................................................................................ 1-11

Chapter 2 BIOS and RAID Support

2.1 Knowing BIOS ............................................................................................... 2-1

2.2 BIOS setup program ..................................................................................... 2-2

2.3 ASUS EZ Flash 3 ........................................................................................... 2-3

2.4 ASUS CrashFree BIOS 3 .............................................................................. 2-4

2.5 RAID congurations ..................................................................................... 2-5

Appendix

Notices ..................................................................................................................... A-1

ASUS contact information ...................................................................................... A-6

iii

Safety information

Electrical safety

• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.

• When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.

• Before connecting or removing signal cables from the motherboard, ensure that all power
cables are unplugged.

• Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.

• Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.

• If the power supply is broken, do not try to x it by yourself. Contact a qualied service
technician or your retailer.

Operation safety

• Before installing the motherboard and adding components, carefully read all the manuals
that came with the package.

• Before using the product, ensure all cables are correctly connected and the power cables
are not damaged. If you detect any damage, contact your dealer immediately.

• To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.

• Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may be exposed to moisture.

• Place the product on a stable surface.

• If you encounter technical problems with the product, contact a qualied service
technician or your retailer.

• Your motherboard should only be used in environments with ambient temperatures
between 0°C and 40°C.

iv

About this guide

This user guide contains the information you need when installing and conguring the

motherboard.

How this guide is organized

This guide contains the following parts:

• Chapter 1: Product introduction

This chapter describes the features of the motherboard and the new technology it
supports. It includes descriptions of the switches, jumpers, and connectors on the
motherboard.

• Chapter 2: BIOS and RAID Support

This chapter tells how to boot into the BIOS, upgrade BIOS using the EZ Flash Utility
and support on RAID.

Where to nd more information

Refer to the following sources for additional information and for product and software
updates.

1. ASUS website

The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.

2. Optional documentation

Your product package may include optional documentation, such as warranty flyers,
that may have been added by your dealer. These documents are not part of the
standard package.

Conventions used in this guide

To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.

CAUTION: Information to prevent damage to the components and injuries to
yourself when trying to complete a task.

IMPORTANT: Instructions that you MUST follow to complete a task.

NOTE: Tips and additional information to help you complete a task.

v

Package contents

Check your motherboard package for the following items.

Motherboard

Cables

Miscellaneous

Application DVD

Documentation

If any of the above items is damaged or missing, contact your retailer.

1 x PRIME B550-PLUS motherboard

2 x SATA 6Gb/s cables

1 x I/O Shield
1 x M.2 SSD screw package

1 x Support DVD

1 x User manual

PRIME B550-PLUS specications summary

CPU

Chipset AMD B550 Chipset

Memory

Graphics

Expansion Slots

Multi-GPU Support

Storage

AMD Socket AM4 for 3rd Gen AMD Ryzen™ Processors*

*Refer to www.asus.com for CPU support list.

3rd Gen AMD Ryzen™ Processors

4 x DIMM, Max. 128GB, DDR4 4400(O.C)/4000(O.C)/3866(O.C)/3600(O.C)/

3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz, Un-buffered Memory*

Dual Channel Memory Architecture

*ECC Memory (ECC mode) support varies by CPU.

**Refer to www.asus.com for the Memory QVL (Qualied Vendors Lists).

1 x DisplayPort 1.2

TM

1 x HDMI

*Graphics specications may vary between CPU types.

2.1(4K@60HZ)

3rd Gen AMD Ryzen™ Processors

1 x PCIe 4.0 x16 slot (supports x16 mode)

AMD B550 Chipset

1 x PCIe 3.0 x16 slot (supports x4 mode)*

3 x PCIe 3.0 x1 slots**

*Support PCIe bifurcation for RAID on CPU function.
** PCIE 3.0 X16_2 runs x2 mode when PCIEX1_2 or PCIEX1_3 is occupied.

Supports AMD 2-Way CrossFireX™ Technology

Total supports 2 x M.2 slots and 6 x SATA 6Gb/s ports

3rd Gen AMD Ryzen™ Processors

M.2_1 slot (Key M), type 2242/2260/2280/22110

(supports PCIe 4.0 x4 & SATA modes)

AMD B550 Chipset

M.2_2 slot (Key M), type 2242/2260/2280/22110

(supports PCIe 3.0 x4 & SATA modes)*

6 x SATA 6Gb/s ports

Support Raid 0, 1, 10

* M2_2 shares bandwidth with SATA6G_56. When M.2_2 is populated, SATA6G_56

will be disabled.

(continued on the next page)

vi

PRIME B550-PLUS specications summary

Ethernet

USB

Audio

Back Panel I/O Ports

Internal I/O
Connectors

1 x Realtek RTL8111H 1Gb Ethernet

Rear USB (Total 8 ports)

2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C®)

4 x USB 3.2 Gen 1 ports (4 x Type-A)

2 x USB 2.0 ports (2 x Type-A)

Front USB (Total 6 ports)

1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports

2 x USB 2.0 headers support additional 4 USB 2.0 ports

Realtek ALC 887 7.1-Channel High Denition Audio CODEC

- Supports Jack detection, Multi-streaming, Front Panel Jack-retasking

- Supports up to 24-Bit/192 kHz playback

Audio Features

- Audio Shielding

- LED-illuminated audio trace path design

- Premium Japanese audio capacitors

- Dedicated audio PCB layers

- Unique de-pop circuit

2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C®)

4 x USB 3.2 Gen 1 ports (4 x Type-A)

2 x USB 2.0 ports (2 x Type-A)

1 x DisplayPort

1 x HDMITM port

1 x Realtek 8111H Ethernet port

5 x Audio jacks

1 x Optical S/PDIF out port

Fan and cooling related

1 x 4-pin CPU Fan header

1 x 4-pin CPU OPT Fan header

1 x 4-pin AIO Pump header

3 x 4-pin Chassis Fan headers

Power related

1 x 24-pin Main Power connector

1 x 8-pin +12V Power connector

Storage related

2 x M.2 slots (Key M)

6 x SATA 6Gb/s ports

USB

1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports

2 x USB 2.0 headers support additional 4 USB 2.0 ports

(continued on the next page)

vii

PRIME B550-PLUS specications summary

Miscellaneous

1 x AURA Addressable Gen 2 header

2 x AURA RGB headers

1 x Clear CMOS header

Internal I/O
Connectors

Special Features

Software
Features

1 x COM Port header

1 x Front Panel Audio header (AAFP)

1 x SPI TPM header (14-1pin)

1 x 20-3 pin System Panel header with Chassis intrude function

1 x Thermal Sensor header

1 x Thunderbolt header

ASUS 5X PROTECTION III

- ASUS DIGI+ VRM

- ASUS Enhanced DRAM Overcurrent Protection

- ASUS ESD Guards

- ASUS LANGuard

- ASUS Overvoltage Protection

- ASUS SafeSlot Core

- ASUS Stainless-Steel Back I/O

ASUS Q-Design

- ASUS Q-DIMM

- ASUS Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device
[yellow green])

- ASUS Q-Slot

ASUS Thermal Solution

- Aluminum heatsink design

ASUS EZ DIY

- SafeSlot

AURA Sync

- Standard RGB headers

- Addressable Gen 2 RGB header

ASUS Exclusive Software

Armoury Crate

- Aura Creator

- Aura Sync

AI Suite 3

- Performance And Power Saving Utility

TurboV EVO
EPU

Digi+ VRM

Fan Xpert 4

- EZ update

ASUS CPU-Z

AI Charger

DAEMON Tools

Norton Anti-virus software (Free Trial for 60 days)

WinRAR

viii

(continued on the next page)

PRIME B550-PLUS specications summary

UEFI BIOS

Software
Features

BIOS 256 Mb Flash ROM, UEFI AMI BIOS

Manageability WOL by PME, PXE

Operating
System

Form Factor

ASUS EZ DIY

- ASUS CrashFree BIOS 3

- ASUS EZ Flash 3

- ASUS UEFI BIOS EZ Mode

Windows® 10 - 64 bit

ATX Form Factor

12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )

Specications are subject to change without notice. Refer to the ASUS website for the

latest specications.

ix

Connectors with shared bandwidth

U32G2_C4

U32G2_3

LAN_U32G1_56

HDMI
_DP

Realtek
8111H

EATX12V

DIGI+

VRM

CPU_FAN CPU_OPT

RGB_HEADER1

BOOT

VGA
CPU

DRAM

U2_56U32G1_78

AUDIO

A

A

A

Configuration

CHA_FAN1

AIO_PUMP

256Mb

BIOS

SPI_TPM

22110

Super

I/O

ALC
887

AAFP

2280 2260 2242

PCIEX1_1

PCIEX1_2

PCIEX1_3

TB_HEADER

PCIEX16_1

PCIEX16_2

COM

22110

COM_DEBUG

RGB_HEADER2

ADD_GEN 2

BATTERY

2280

CLRTC

1 (Defualt)

SOCKET AM4

M.2_1(SOCKET3)

2260 2242

T_SENSOR

USB_E34 USB_E12

CHA_FAN3 CHA_FAN2

PCIEX16_2 x4 x2

PCIEX1_2 - x1

A

PCIEX1_3 - x1

Configuration

M.2_2 x4 -

B

SATA6G_56 - v

1 (Default)

EATXPWR

DDR4 DIMM_A1 (64bit, 288-pin module)

DDR4 DIMM_A2* (64bit, 288-pin module)

DDR4 DIMM_B1 (64bit, 288-pin module)

DDR4 DIMM_B2* (64bit, 288-pin module)

U32G1_12

AMD
B550

M.2_2(SOCKET3)

PANEL

2

2

SATA6G_12SATA6G_34SATA6G_56

B

B

• PCIE 3.0 X16_2 runs x2 mode when PCIE X1_2 or PCIEX1_3 is occupied.

• M2_2 shares bandwidth with SATA6G_56. When M.2_2 is populated, SATA6G_56
will be disabled.

x

Product introduction

1

1.1 Before you proceed

Take note of the following precautions before you install motherboard components or change
any motherboard settings.

• Unplug the power cord from the wall socket before touching any component.

• Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due
to static electricity.

• Before you install or remove any component, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so
may cause severe damage to the motherboard, peripherals, or components.

1.2 Motherboard overview

214 15 114

RGB_HEADER1

BOOT

VGA
CPU

DRAM

EATXPWR

DDR4 DIMM_A1 (64bit, 288-pin module)

DDR4 DIMM_A2* (64bit, 288-pin module)

DDR4 DIMM_B1 (64bit, 288-pin module)

DDR4 DIMM_B2* (64bit, 288-pin module)

U32G1_12

19

5

30.5cm(12in)

8

Place this

side towards

the rear of the

chassis

5

U32G2_C4

U32G2_3

LAN_U32G1_56

HDMI
_DP

U2_56U32G1_78

AUDIO

6

Realtek
8111H

22110

EATX12V

CHA_FAN1

2280 2260 2242

DIGI+
VRM

AIO_PUMP

256Mb
BIOS

PCIEX16_1

24.4cm(9.6in)

CPU_FAN CPU_OPT

SOCKET AM4

SPI_TPM

M.2_1(SOCKET3)

3

Unplug the power cord before installing or removing the motherboard. Failure to do so can
cause you physical injury and damage motherboard components.

ASUS PRIME B550-PLUS

M.2_2(SOCKET3)

PANEL

44

SATA6G_12SATA6G_34SATA6G_56

7

6

169

AMD
B550

2260 2242

USB_E34 USB_E12

CHA_FAN3 CHA_FAN2

22110

COM_DEBUG

RGB_HEADER2

ADD_GEN 2

BATTERY

2280

T_SENSOR

CLRTC

Super

PCIEX1_1

I/O

PCIEX16_2

ALC
887

PCIEX1_2

PCIEX1_3

COM

TB_HEADER

AAFP

18 13 11 10 12 1714

1-1