Asrock B550 Phantom Gaming-ITX/ax Quick Installation Guide

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 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)

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.

CE Warning

is device complies with directive 2014/53/EU issued by the Commision of the European
Community.

is equipment complies with EU radiation exposure limits set forth for an uncontrolled
environment.
is equipment should be installed and operated with minimum distance 20cm between
the radiator & your body.

Operations in the 5.15-5.35GHz band are restricted to indoor usage only.

Radio transmit power per transceiver type

Function Frequency Maximum Output Power (EIRP)

2400-2483.5 MHz 18.5 + / -1.5 dbm

5150-5250 MHz 21.5 + / -1.5 dbm

WiFi

Bluetooth 2400-2483.5 MHz 8.5 + / -1.5 dbm

5250-5350 MHz

5470-5725 MHz

18.5 + / -1.5 dbm (no TPC)

21.5 + / -1.5 dbm (TPC)

25.5 + / -1.5 dbm (no TPC)

28.5 + / -1.5 dbm (TPC)

Motherboard Layout

Top Side View

B550 Phantom Gaming-ITX/ax

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Back Side View

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No. Description

1 ATX 12V Power Connector (ATX12V1)

2 CPU Fan Connector (CPU_FAN1)

3 Addressable LED Header (ADDR_LED1)

4 RGB LED Header (RGB_LED1)

5 CPU/Water Pump Fan Connector (CPU_FAN2/WP)

6 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)

7 ATX Power Connector (ATXPWR1)

8 SATA3 Connectors (SATA3_1_2)

9 SATA3 Connectors (SATA3_3_4)

10 USB 3.2 Gen1 Header (USB3_5_6)

11 System Panel Header (PANEL1)

12 USB 2.0 Header (USB_1_2)

13 Front Panel Type C USB 3.2 Gen2 Header (USB32_TC_2)

14 Clear CMOS Jumper (CLRCMOS1)

15 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)

16 Chassis Speaker Header (SPEAKER1)

17 Front Panel Audio Header (HD_AUDIO1)

B550 Phantom Gaming-ITX/ax

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I/O Panel

1

2

3

4

5

10

9

8

7

6

No. Description No. Description

1 2.5G LAN RJ-45 Port (Intel® I225V)* 6 Antenna Ports

USB 3.2 Gen2 Type-A Port

2

(USB32_TA_1)

7 Microphone (Pink)**

3 DisplayPort 1.4 8 USB 3.2 Gen1 Ports

4 Line In (Light Blue)** 9 HDMI Port

5 Front Speaker (Lime)** 10

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

ACT/LINK L ED

SPEED LE D

LAN Por t

USB 3.2 Gen2 Type-C Port
(USB32_TC_1)

Activity / Link LED Speed LED

Status Description Status Description

O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps/1Gbps connection

On Link Green 2.5Gbps connection

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** Function of the Au dio 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

B550 Phantom Gaming-ITX/ax

WiFi-802.11ax Module and ASRock WiFi 2.4/5 GHz Antenna

WiFi-802.11ax + BT Module

is motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ax + BT v5.2 module
(pre-installed on the rear I/O panel) that oers support for WiFi 802.11 a/b/g/n/
ax connectivity standards and Bluetooth v5.2. WiFi + BT module is an easy-to-use
wireless local area network (WLAN) adapter to support WiFi + BT. Bluetooth v5.2
standard features Smart Ready technology that adds a whole new class of functionality
into the mobile devices. BT 5.2 also includes Low Energy Technology and ensures
extraordinary low power consumption for PCs. e 2T2R WiFi solution sets a WiFi
high speed standard and oers max link rate up to 2.4Gbps.

* e transmission speed may vary according to the environment.

ASRock WiFi 2.4/5 GHz Antenna

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Chapter 1 Introduction

ank you for purchasing ASRock B550 Phantom Gaming-ITX/ax 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.

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

1.1 Package Contents

ASRock B550 Phantom Gaming-ITX/ax Motherboard (Mini-ITX Form Factor)

•

ASRock B550 Phantom Gaming-ITX/ax Quick Installation Guide

•

ASRock B550 Phantom Gaming-ITX/ax Support CD

•

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

•

1 x Screw for M.2 Socket (Optional)

•

1 x ASRock WiFi 2.4/5 GHz Antenna (Optional)

•

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1.2 Specications

Platform

CPU

Chipset

Memory

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* Not compatible with AMD AthlonTM Processors.

•

•

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•

•

•

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* Please refer to Memory Support List on ASRock’s website for
more information. (http://www.asrock.com/)
* Please refer to page 23 for DDR4 UDIMM maximum
frequency support.

•

•

•

B550 Phantom Gaming-ITX/ax

Mini-ITX Form Factor
8 Layer PCB
2oz Copper PCB

Supports AMD AM4 Socket RyzenTM 3000, 3000 G-Series,
4000 G-Series, 5000 and 5000 G-Series Desktop Processors*

Digi Power design
8 Power Phase design

AMD B550

Dual Channel DDR4 Memory Technology
2 x DDR4 DIMM Slots
AMD Ryzen series CPUs (Matisse) 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, un­buered 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, un­buered memory*

Max. capacity of system memory: 64GB
Supports Extreme Memory Prole (XMP) memory modules
15μ Gold Contact in DIMM Slots

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Expansion
Slot

Graphics

AMD Ryzen series CPUs (Matisse)

1 x PCI Express x16 Slot (PCIE1: Gen4x16 mode)*

•

AMD Ryzen series APUs (Renoir)

1 x PCI Express x16 Slot (PCIE1: Gen3x16 mode)*

•

* Supports NVMe SSD as boot disks

1 x Vertical M.2 Socket (Key E) with the bundled WiFi-

•

802.11ax module (on the rear I/O)
15μ Gold Contact in VGA PCIe Slot (PCIE1)

•

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

Dual graphics output: support HDMI and DisplayPort 1.4

•

ports by independent display controllers

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

•

(4096x2160) @ 60Hz

Supports DisplayPort 1.4 with max. resolution up to 5K

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(5120x2880)@120Hz

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 and DisplayPort 1.4

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Ports

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

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DisplayPort 1.4 Ports

Supports Microso PlayReady®

•

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Audio

7.1 CH HD Audio with Content Protection (Realtek

•

ALC1220 Audio Codec)

Premium Blu-ray Audio support

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Supports Surge Protection

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120dB SNR DAC with Dierential Amplier

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Pure Power-In

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Direct Drive Technology

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LAN

Wireless
LAN

B550 Phantom Gaming-ITX/ax

PCB Isolate Shielding

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Impedance Sensing on Rear Out port

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Individual PCB Layers for R/L Audio Channel

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15μ Gold Audio Connector

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Nahimic Audio

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2.5 Gigabit LAN 10/100/1000/2500 Mb/s

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GigaLAN Intel® I225V

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Supports Wake-On-LAN

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Supports Lightning/ESD Protection

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Supports Energy Ecient Ethernet 802.3az

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Supports PXE

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Intel® 802.11ax WiFi Module

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Supports IEEE 802.11a/b/g/n/ax

•

Supports Dual-Band (2.4/5 GHz)

•

Supports WiFi6 802.11ax (2.4Gbps)

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2 antennas to support 2 (Transmit) x 2 (Receive) diversity

•

technology
Supports Bluetooth 5.2 + High speed class II

•

Supports MU-MIMO

•

Rear Panel
I/O

Storage

2 x Antenna Ports

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1 x HDMI Port

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1 x DisplayPort 1.4

•

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

•

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

•

Protection)
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

•

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

•

RAID 1 and RAID 10), NCQ, AHCI and Hot Plug
1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2

•

PCI Express module up to Gen4x4 (64 Gb/s) (with Matisse)
or Gen3x4 (32 Gb/s) (with Renoir)*

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Connector

1 x M.2 Socket, supports M Key type 2280 M.2 SATA3 6.0

•

Gb/s module and M.2 PCI Express module up to Gen3 x4 (32

Gb/s)*
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit (M2_1)

1 x RGB LED Header

•

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

1 x Addressable LED Header

•

* Supports 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 maximum
1A (12W) fan power.

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

•

Speed Control)

1 x Chassis/Water Pump Fan Connector (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 and CHA_FAN1/WP can auto detect if 3-pin
or 4-pin fan is in use.

1 x 24 pin ATX Power Connector (Hi-Density Power Con-

•

nector)

1 x 8 pin 12V Power Connector (Hi-Density Power Connec-

•

tor)

1 x Front Panel Audio Connector (15μ Gold Audio Connec-

•

tor)

1 x USB 2.0 Header (Supports 2 USB 2.0 ports) (Supports

•

ESD Protection)

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

•

(Supports ESD Protection)

1 x Front Panel Type C USB 3.2 Gen2 Header (Supports ESD

•

Protection)

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BIOS
Feature

Hardware
Monitor

OS

B550 Phantom Gaming-ITX/ax

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, Chipset 1.05V,

•

2.50V, +1.8V, VDDP Voltage Multi-adjustment

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

•

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

•

Microso® Windows® 10 64-bit

•

FCC, CE

Certica­tions

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

Please realize that the re is a certain risk involved with overclocking, including
adjusting the setting in the BIOS, applying Untied Overclocking Technology, or using
third-party overclocking tool s. Overclocking may aect 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.

•

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

•

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Chapter 2 Installation

is is a Mini-ITX 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.

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2.1 Installing the CPU

Unplug all power cables be fore installing the CPU.

1

B550 Phantom Gaming-ITX/ax

2

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13

3

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B550 Phantom Gaming-ITX/ax

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. Make 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

2

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15

3

English

16

4

1

N

FA

_

U

P

C

Installing the AM4 Box Cooler SR2

1

B550 Phantom Gaming-ITX/ax

2

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3

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B550 Phantom Gaming-ITX/ax

4

1

N

FA

_

U

P

C

*e diagrams shown here are for reference only. e headers might be in a dierent position on
your motherboard.

19

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Installing the AM4 Box Cooler SR3

1

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2

B550 Phantom Gaming-ITX/ax

4

3

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5

CPU_FAN1

6

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1

N

FA

_

U

P

C

2

D

E

L

_

B

RG

+12V

*e diagrams shown here are for reference only. e headers might be in a dierent position
on your motherboard.

B550 Phantom Gaming-ITX/ax

2.3 Installing Memory Modules (DIMM)

is motherboard provides two 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 unable to activate Dual Channel Memor y Technology with only one 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.

AMD non-XMP Memory Frequency Support

Ryzen Series CPUs (Matisse):

UDIMM Memory Slot

A1 B1

SR - 3200

- SR 3200

DR - 3200

- DR 3200

SR SR 3200

DR DR 3200

Ryzen Series APUs (Renoir):

UDIMM Memory Slot

A1 B1

SR - 3200

- SR 3200

DR - 3200

- DR 3200

SR SR 3200

DR DR 3200

Frequency

(Mhz)

Frequency

(Mhz)

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

1

2

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3

B550 Phantom Gaming-ITX/ax

2.4 Expansion Slot (PCI Express Slot)

ere is 1 PCI Express slot 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 make 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.

PCIe Slot Congurations

PCIE1

Ryzen Series CPUs (Matisse) Gen4x16

Ryzen Series APUs (Renoir) Gen3x16

For a better ther mal environment, please connect a chassi s fan to the motherboard’s
chassis fan connector (CHA_ FAN1/WP) when using multiple graphics cards.

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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
“Open”.

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Clear CMOS Jumper
(CLRCMOS1)
(see p.1, No. 14)

CLRCMOS1 allows you to clear the data in CMOS. e data in CMOS includes
system setup information such as system password, date, time, and system setup
parameters. To clear and reset the system parameters to default setup, please
turn o the computer and unplug the power cord, then use a jumper cap to short
the pins on CLRCMOS1 for 3 seconds. Please remember to remove the jumper
cap aer clearing the CMOS. 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.

2-pin Jumper

Short: Clear CMOS
Open: Default

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