ASROCK PRO Series 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: [e-mail]
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Contents
Chapter 1 Introduction 1
1.1 Package Contents 1
1.2 Specications 2
1.3 Motherboard Layout 6
1.4 I/O Panel 8
1.5 Block Diagram 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 Connecting the Front Panel Header 25
2.5 Installing the Motherboard 26
2.6 Installing SATA Drives 27
2.7 Installing a Graphics Card 29
2.8 Connecting Peripheral Devices 32
2.9 Connecting the Power Connectors 33
2.10 Power On 34
2.11 Jumpers Setup 35
2.12 Onboard Headers and Connectors 36
2.13 M.2 SSD Module Installation Guide 45

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B550M Pro SE
Chapter 1 Introduction
ank you for purchasing ASRock B550M Pro SE 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 B550M Pro SE Motherboard (Micro ATX Form Factor)
• ASRock B550M Pro SE User Manual
• 2 x Serial ATA (SATA) Data Cables (Optional)
• 2 x Screws for M.2 Sockets (Optional)
Because 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 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 • Micro ATX Form Factor
CPU • Supports AMD AM4 Socket RyzenTM 3000, 3000 G-Series,
4000 G-Series, 5000 and 5000 G-Series Desktop Processors*
* Not compatible with AMD Athlon™ Processors.
Chipset • AMD PRO565
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*
* 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/)

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B550M Pro SE
• Max. capacity of system memory: 128GB
• Supports Extreme Memory Prole (XMP) memory modules
* Please refer to page 21 for AMD non-XMP memory frequency
support. For more details, please refer to the QVL on ASRock’s
website.
Expansion
Slot
AMD Ryzen series CPUs (Vermeer and Matisse)
• 2 x PCIe x16 Slots (PCIE1: Gen4x16 mode; PCIE3: Gen3 x4
mode)*
AMD Ryzen series APUs (Cezanne and Renoir)
• 2 x PCIe x16 Slots (PCIE1: Gen3x16 mode; PCIE3: Gen3 x4
mode)*
AMD Ryzen series APUs (Picasso)
• 2 x PCIe x16 Slots (PCIE1: Gen3x8 mode; PCIE3: Gen3 x4
mode)*
* Supports NVMe SSD as boot disks
• Supports AMD CrossFireTM
• 1 x PCIe 3.0 x1 Slot (PCIE2: x1 mode)
Graphics • Integrated AMD RadeonTM Vega Series Graphics in Ryzen
Series APU* (Actual support may vary by CPU)
• 1 x HDMI 2.1, supports HDR, HDCP 2.3, 4K Ultra HD
(UHD) playback and max. resolution up to 4K 60Hz*
• 1 x DisplayPort 1.4, supports HDCP 2.3, 4K Ultra HD
(UHD) playback and max. resolution up to 5K 120Hz
* Picasso supports HDCP 2.2 with HDMI 2.0 Port
Audio • 7.1 CH HD Audio (Realtek ALC897 Audio Codec)
LAN • 2.5 Gigabit LAN 10/100/1000/2500 Mb/s
• Dragon RTL8125BG
• Supports Dragon 2.5G LAN Soware
- Smart Auto Adjust Bandwidth Control
- Visual User Friendly UI
- Visual Network Usage Statistics
- Optimized Default Setting for Game, Browser, and
Streaming Modes
- User Customized Priority Control

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USB • 6 x USB 3.2 Gen1 Type-A (4 Rear, 2 Front)
• 6 x USB 2.0 (2 Rear, 4 Front)
* All USB ports support ESD Protection
Rear Panel
I/O
• 1 x PS/2 Mouse/Keyboard Port
• 1 x HDMI Port
• 1 x DisplayPort 1.4
• 4 x USB 3.2 Gen1 Ports
• 2 x USB 2.0 Ports
• 1 x RJ-45 LAN Port with LED
• HD Audio Jacks: Line in / Front Speaker / Microphone
Storage CPU:
• 1 x Hyper M.2 Socket (M2_1, Key M), supports type 2280
PCIe Gen4x4 (64 Gb/s) mode (with Vermeer, Matisse) or
Gen3x4 (32 Gb/s) mode (with Cezanne, Renoir and Picasso)*
Chipset:
• 1 x M.2 Socket (M2_2, Key M), supports type 2280 SATA3
6.0 Gb/s & PCIe Gen3x2 (16 Gb/s) modes*
• 4 x SATA3 6.0 Gb/s Connectors
* Supports NVMe SSD as boot disks
RAID • Supports RAID 0, RAID 1 and RAID 10 for SATA storage
devices
Connector • 1 x SPI TPM Header
• 1 x Power LED and Speaker Header
• 2 x RGB LED Headers*
• 2 x Addressable LED Headers**
• 1 x CPU Fan Connector (4-pin)***
• 3 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan
Speed Control)****
• 1 x 24 pin ATX Power Connector
• 1 x 8 pin 12V Power Connector
• 1 x Front Panel Audio Connector
• 2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
• 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)
* Support in total up to 12V/3A, 36W LED Strip
** Support in total up to 5V/3A, 15W LED Strip

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B550M Pro SE
*** CPU_FAN1 supports the fan power up to 1A (12W).
**** CHA_FAN1~3/WP support the fan power up to 2A (24W).
**** CHA_FAN1~3/WP can auto detect if 3-pin or 4-pin fan is
in use.
BIOS
Feature
• AMI UEFI Legal BIOS with GUI support
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
Please realize that there is a certain risk involved with overclocking, including
adjusting 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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1.3 Motherboard Layout

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B550M Pro SE
No. Description
1 8 pin 12V Power Connector (ATX12V1)
2 CPU Fan Connector (CPU_FAN1)
3 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
4 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
5 RGB LED Header (RGB_LED1)
6 Addressable LED Header (ADDR_LED1)
7 ATX Power Connector (ATXPWR1)
8 USB 3.2 Gen1 Header (USB3_5_6)
9 SATA3 Connector (SATA3_2)
10 SATA3 Connector (SATA3_1)
11 SATA3 Connector (SATA3_4)(Upper), SATA3 Connector (SATA3_3)(Lower)
12 System Panel Header (PANEL1)
13 Power LED and Speaker Header (SPK_PLED1)
14 Chassis/Water Pump Fan Connector (CHA_FAN3/WP)
15 SPI TPM Header (SPI_TPM_J1)
16 USB 2.0 Header (USB_3_4)
17 USB 2.0 Header (USB_5_6)
18 Chassis/Water Pump Fan Connector (CHA_FAN2/WP)
19 Clear CMOS Jumper (CLRCMOS1)
20 Addressable LED Header (ADDR_LED2)
21 RGB LED Header (RGB_LED2)
22 Front Panel Audio Header (HD_AUDIO1)
23 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)

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1.4 I/O Panel
No. Description No. Description
1 USB 2.0 Ports (USB_12) 6 USB 3.2 Gen1 Type-A Ports (UB32_34)
2 2.5G LAN RJ-45 Port* 7 USB 3.2 Gen1 Type-A Ports (UB32_12)
3 Line In (Light Blue)** 8 PS/2 Mouse/Keyboard Port
4 Front Speaker (Lime)** 9 DisplayPort 1.4
5 Microphone (Pink)** 10 HDMI 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
6 578910
1 2 4
3
ACT/LINK LED
SPEED LED
LAN Port
* 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/1Gbps connection
On Link Green 2.5Gbps connection

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B550M Pro SE
1.5 Block Diagram
PRO565
PCIE x1
RTL 8125BG-CG 2.5Gb LAN con.
DDR4 2133/3200+
PCI-E X16 SLOT
PCI-E Gen4 BUS
PCIE 3.0 X4 BUS
USB3.1 Gen1
2 ports(2*rear)
5Gb/s
AMD AM4
TPM-S header
LPC BUS
33MHz
SIO
NCT6796D-R
NCT3947S
NCT3947S
NCT3947S
CHA FAN3/WP
CHA FAN2/WP
CHA FAN1/WP
High-Speed USB
2 ports*Rear
SOCKET 1331P
Channel B
AMD
SATA3_3
SATA3_1
Processor
480Mb/s
24MHz
ALC897
128-bit Dual-Channel Memory x 4 Slots
DDR4 2133/3200+
Channel A
USB3.1 Gen1
4 ports(2*rear+2*front)

PCIE 4.0 x4
1st M.2 Slot / Gen4 x4
SATA3_4
SATA3_2
CPU FAN1
PCIE4.0 x4
2nd M.2 Slot / Gen3x2(SATA)
SPI
ROM
128Mb
PCIE3.0 x1
1st PCI-E x1 SLOT
PCIE3.0 x4
PCI-E x4 SLOT
High-Speed USB
LED MCU
480Mb/s
480Mb/s
4 ports*Front
High-Speed USB
PCIE3.0 x1
PCI-E x1 SLOT

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is is a Micro 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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B550M Pro SE
2.1 Installing the CPU
Unplug all power cables before installing the CPU.
2
1

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3

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B550M Pro SE
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

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3
4
CPU_FAN1

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B550M Pro SE
Installing the AM4 Box Cooler SR2
1
2

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3

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B550M Pro SE
*e diagrams shown here are for reference only. e headers might be in a dierent
position on your motherboard.
4
CPU_FAN1