ASROCK B550 PHANTOM GAMING 4 User manual

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://www.asrock.com; or you may contact your dealer
for further information. For technical questions, please submit a support request
form at https://event.asrock.com/tsd.asp
ASRock Incorporation
e-mail: [e-mail]
ASRock EUROPE B.V.
e-mail: [e-mail]
ASRock America, Inc.
e-mail: sa[email protected]
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B550 Phantom Gaming 4/ac
B550 Phantom Gaming 4

B550 Phantom Gaming 4/ac
B550 Phantom Gaming 4
1
English
Motherboard Layout
DDR4_A2 (64 bit, 288-pin module)
DDR4_A1 (64 bit, 288-pin module)
DDR4_B2 (64 bit, 288-pin module)
DDR4_B1 (64 bit, 288-pin module)
ATX12V1
ATXPWR1
PCIE3
HDLED RESET
PLED PWRBTN
PANEL1
1
USB_3_4
11
SPK_PLED1
1
HD_AUDIO1
PCIE1
RoHS
13
17
2
Hyper M.2
PCIe Gen4 x4
CMOS
Battery
PCIE2
12
9
USB3_7_8
10
SATA3_4
SATA3_3
CLRCMOS1
1
3
PCIE4
AUDIO
CODEC
SUPER
I/O
18
20
2122
28 19
6
5
CHA_FAN3/WP
CHA_FAN1/WP
CPU_FAN2/WP
ATX12V2
CPU_FAN1
4
1
16
ADDR_LED1
1
RGB_LED1
1
26
ADDR_LED2
1
RGB_LED2
17
8
29
CPU
DRAM
VGA
BOOT
USB 3 .2 Gen1
T:USB3_1
B: USB3_2
Top:
RJ-45
USB 3.2 Gen1
T: USB3_5
B: USB3_6
PS2
Keyboard
/Mouse
Top:
LINE IN
Center:
FRONT
Bottom:
MIC IN
USB_1_2
1
27
SOCKETAM4
15
14
SATA3_2
SATA3_1
COM1
1
23
CHA_FAN2/WP
M2_1
C 3
C 2
TTC 4
T
C 1
T
25 24
CHA_FAN4/WP
USB 3.2 Gen1
T: USB3_3
B: USB3_4
HDMI1
1
SPI_TPM_J1
11
AMD
B550
M2_2
M2_WIFI_CT1WiFi-802.11ac
Module
B550 Phantom Gaming 4/ac

English
2
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_3)
13 SATA3 Connector (SATA3_4)
14 SATA3 Connector (SATA3_1)
15 SATA3 Connector (SATA3_2)
16 Post Status Checker (PSC)
17 System Panel Header (PANEL1)
18 Power LED and Speaker Header (SPK_PLED1)
19 Chassis Fan / Waterpump Fan Connector (CHA_FAN1/WP)
20 Clear CMOS Jumper (CLRCMOS1)
21 USB 2.0 Header (USB_3_4)
22 USB 2.0 Header (USB_1_2)
23 Chassis Fan / Waterpump Fan Connector (CHA_FAN2/WP)
24 Chassis Fan / Waterpump Fan Connector (CHA_FAN4/WP)
25 Addressable LED Header (ADDR_LED1)
26 RGB LED Header (RGB_LED1)
27 COM Port Header (COM1)
28 Front Panel Audio Header (HD_AUDIO1)
29 Chassis Fan / Waterpump Fan Connector (CHA_FAN3/WP)

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English
DDR4_A2 (64 bit, 288-pin module)
DDR4_A1 (64 bit, 288-pin module)
DDR4_B2 (64 bit, 288-pin module)
DDR4_B1 (64 bit, 288-pin module)
ATX12V1
ATXPWR1
PCIE3
HDLED RESET
PLED PWRBTN
PANEL1
1
USB_3_4
11
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
CLRCMOS1
1
M2_2
M2_WIFI_CT1
M2_3
C 7
C 6
C 5
3
PCIE4
TTT
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
17
8
31
CPU
DRAM
VGA
BOOT
USB 3 .2 Gen1
T:USB3_1
B: USB3_2
Top:
RJ-45
USB 3.2 Gen1
T: USB3_5
B: USB3_6
PS2
Keyboard
/Mouse
Top:
LINE IN
Center:
FRONT
Bottom:
MIC IN
USB_1_2
1
29
C 8
T
SOCKETAM4
17
16
SATA3_2
SATA3_1
COM1
1
25
CHA_FAN2/WP
M2_1
C 3
C 2
TTC 4
T
C 1
T
27 26
CHA_FAN4/WP
USB 3.2 Gen1
T: USB3_3
B: USB3_4
HDMI1
1
SPI_TPM_J1
11
AMD
B550
B550 Phantom Gaming 4

English
4
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 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)
31 Chassis Fan / Waterpump Fan Connector (CHA_FAN3/WP)

B550 Phantom Gaming 4/ac
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I/O Panel
B550 Phantom Gaming 4/ac
1
10 6
7
2
5
4
3
8
9
B550 Phantom Gaming 4
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10 6
7
2
5
4
3
8
9
No. Description No. Description
1 PS/2 Mouse/Keyboard Port 6 USB 3.2 Gen1 Ports (USB3_5_6)
2 LAN RJ-45 Port* 7 USB 3.2 Gen1 Ports (USB3_3_4)
3 Line In (Light Blue)** 8 Antenna Ports
4 Front Speaker (Lime)** 9 HDMI Port
5 Microphone (Pink)** 10 USB 3.2 Gen1 Ports (USB3_1_2)
No. Description No. Description
1 PS/2 Mouse/Keyboard Port 6 USB 3.2 Gen1 Ports (USB3_5_6)
2 LAN RJ-45 Port* 7 USB 3.2 Gen1 Ports (USB3_3_4)
3 Line In (Light Blue)** 8 Antenna Bracket
4 Front Speaker (Lime)** 9 HDMI Port
5 Microphone (Pink)** 10 USB 3.2 Gen1 Ports (USB3_1_2)

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

B550 Phantom Gaming 4/ac
B550 Phantom Gaming 4
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WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz Antennas
(For B550 Phantom Gaming 4/ac)
WiFi-802.11ac + BT Module
is motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ac + BT v4.2 module
that oers support for WiFi 802.11 a/b/g/n/ac connectivity standards and Bluetooth
v4.2. WiFi + BT module is an easy-to-use wireless local area network (WLAN) adapter
to support WiFi + BT. Bluetooth v4.2 standard features Smart Ready technology that
adds a whole new class of functionality into the mobile devices. BT 4.2 also includes
Low Energy Technology and ensures extraordinary low power consumption for PCs.
* e transmission speed may vary according to the environment.

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WiFi Antennas Installation Guide
Step 1
Prepare the WiFi 2.4/5 GHz Antennas that come
with the package.
Step 2
Connect the two WiFi 2.4/5 GHz Antennas to
the antenna connectors. Turn the antenna clock-
wise until it is securely connected.
Step 3
Set the WiFi 2.4/5 GHz Antenna as shown in the
illustration.
*You may need to adjust the direction of
the antenna for a stronger signal.

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Chapter 1 Introduction
ank you for purchasing ASRock B550 Phantom Gaming 4/ac / B550 Phantom
Gaming 4 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.
1.1 Package Contents
• ASRock B550 Phantom Gaming 4/ac / B550 Phantom Gaming 4 Motherboard (ATX
Form Factor)
• ASRock B550 Phantom Gaming 4/ac / B550 Phantom Gaming 4 Quick Installation
Guide
• ASRock B550 Phantom Gaming 4/ac / B550 Phantom Gaming 4 Support CD
• 2 x Serial ATA (SATA) Data Cables (Optional)
• 2 x ASRock WiFi 2.4/5 GHz Antennas (Optional) (B550 Phantom Gaming 4/ac)
• 1 x Screw for M.2 Socket (Optional) (B550 Phantom Gaming 4/ac)
• 3 x Screws for M.2 Sockets (Optional) (B550 Phantom Gaming 4)
• 1 x I/O Panel Shield
Because 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 case any modica-
tions 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 specic information about the model you are using. You
may nd the latest VGA cards and CPU support list on ASRock’s website as well.
ASRock website http://www.asrock.com.

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1.2 Specications
Platform • ATX Form Factor
• Solid Capacitor design
• 2oz Copper PCB
CPU • Supports AMD AM4 Socket Ryzen™ 3000, 3000 G-Series,
4000 G-Series, 5000 and 5000 G-Series Desktop Processors*
*
Please refer to CPU support list for details.
• 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 (Vermeer) 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 & non-ECC, un-buered memory*
• 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 & non-ECC, un-buered memory*
• AMD Ryzen series APUs (Cezanne) 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-bu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,
un-buered memory*
• AMD Ryzen series APUs (Picasso) support DDR4
3333+(OC)/3200(OC)/2933/2667/2400/2133 non-ECC,
un-buered memory*

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* For Ryzen Series APUs (Picasso, Cezanne and Renoir), ECC is
only supported with PRO CPUs.
* Please refer to Memory Support List on ASRock's website for
more information. (http://www.asrock.com/)
* Please refer to page 27 for AMD non-XMP memory frequency
support.
• Max. capacity of system memory: 128GB
• Supports Extreme Memory Prole (XMP) memory modules
• 15μ Gold Contact in DIMM Slots
Expansion
Slot
AMD Ryzen series CPUs (Vermeer and Matisse)
• 2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3:
Gen3 x4 mode)*
AMD Ryzen series APUs (Cezanne and Renoir)
• 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3:
Gen3 x4 mode)*
AMD Ryzen series APUs (Picasso)
• 2 x PCI Express x16 Slots (PCIE1: Gen3x8 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.
* e Max shared memory 16GB requires 32GB system memory
installed.
• Supports HDMI 2.1 with max. resolution up to 4K x 2K
(4096x2160) @ 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

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12
• Supports HDCP 2.3 with HDMI 2.1 Port
* Picasso supports HDCP 2.2 with HDMI 2.0 Port
• Supports 4K Ultra HD (UHD) playback with HDMI 2.1 Port
• Supports Microso PlayReady®
Audio • 7.1 CH HD Audio with Content Protection (Realtek
ALC1220/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 Ecient Ethernet 802.3az
• Supports PXE
Wireless
LAN
(For B550
Phantom
Gaming 4/
ac)
• Intel® 802.11ac WiFi Module
• Supports IEEE 802.11a/b/g/n/ac
• Supports Dual-Band (2.4/5 GHz)
• Supports high speed wireless connections up to 433Mbps
• Supports Bluetooth 4.2 + High speed class II
Rear Panel
I/O
• 2 x Antenna Ports (B550 Phantom Gaming 4/ac)
• Antenna Bracket (B550 Phantom Gaming 4)
• 1 x PS/2 Mouse/Keyboard Port
• 1 x HDMI Port
• 6 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

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Storage B550 Phantom Gaming 4/ac:
• 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
2260/2280/22110 M.2 PCI Express module up to Gen4x4 (64
Gb/s) (with Vermeer, Matisse) or Gen3x4 (32 Gb/s) (with
Cezanne, Renoir and Picasso)*
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit
B550 Phantom Gaming 4:
• 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 Vermeer, Matisse) or Gen3x4 (32 Gb/s) (with
Cezanne, Renoir and Picasso)**
• 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
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)
* 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)
• 4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan
Speed Control)

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14
* 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
Hardware
Monitor
• 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, CPU VD-
DCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, +1.8V, VDDP
OS • Microso® Windows® 10 64-bit / 11 64-bit
Certica-
tions
• FCC, CE
• ErP/EuP ready (ErP/EuP ready power supply is required)
* For detailed product information, please visit our website: http://www.asrock.com

B550 Phantom Gaming 4/ac
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English
Please realize that there is a certain risk involved with overclocking, including adjust-
ing the setting in the BIOS, applying Untied Overclocking Technology, or using third-
party overclocking tools. 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.

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16
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.
Chapter 2 Installation

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2.1 Installing the CPU
Unplug all power cables before installing the CPU.
2
1

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18
3

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English
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.
Installing the CPU Box Cooler SR1
Please turn o the power or remove the power cord before changing a CPU or heatsink.
1
2