ASROCK A620M-C 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 9
1.5 Block Diagram 10
1.6 802.11ax Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz
Antennas 11
Chapter 2 Installation 13
2.1 Installing the CPU 14
2.2 Installing the CPU Fan and Heatsink 17
2.3 Installing Memory Modules (DIMM) 25
2.4 Connecting the Front Panel Header 27
2.5 Installing the I/O Panel Shield 28
2.6 Installing the Motherboard 29
2.7 Installing SATA Drives 30
2.8 Installing a Graphics Card 32
2.9 Connecting Peripheral Devices 34
2.10 Connecting the Power Connectors 35
2.11 Power On 36
2.12 Jumpers Setup 37
2.13 Onboard Headers and Connectors 38

2.14 Smart Switches 50
2.15 Post Status Checker 52
2.16 M.2 SSD Module Installation Guide 53
2.17 Change Screen Brightness for eDP in Windows® 55

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A620M-C
Chapter 1 Introduction
ank you for purchasing ASRock A620M-C 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 A620M-C Motherboard (Micro ATX Form Factor)
• 1 x I/O Panel Shield
• 2 x Serial ATA (SATA) Data Cables (Optional)
• 2 x ASRock WiFi 2.4/5/6 GHz Antennas (Optional)
• 3 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 Socket AM5 RyzenTM 7000 Series Processors
* Please refer to CPU Support List on ASRock's website for more
information. (http://www.asrock.com/)
Chipset • AMD A620
Memory • Dual Channel DDR5 Memory Technology
• 4 x DDR5 DIMM Slots
• Supports DDR5 non-ECC, un-buered memory up to
6400+(OC)*
• Max. capacity of system memory: 128GB
• Supports Extreme Memory Prole (XMP) and EXTended
Proles for Overclocking (EXPO) memory modules
* Please refer to Memory Support List on ASRock's website for
more information. (http://www.asrock.com/)
Expansion
Slot
CPU:
• 1 x PCIe 4.0 x16 Slot (PCIE1), supports x16 mode*
• 2 x PCIe 3.0 x16 Slots (PCIE2 and PCIE3), support x1 mode*
• 1 x PCIe 3.0 x16 Slot (PCIE4), supports x2 mode*
Chipset:
• 1 x Vertical M.2 Socket (Key E), supports type 2230 WiFi/
BT PCIe WiFi module
* Supports NVMe SSD as boot disks
• 15μ Gold Contact in VGA PCIe Slot (PCIE1)
Graphics • Integrated AMD RDNATM 2 graphics (Actual support may
vary by CPU)
• 1 x eDP 1.4, supports max. resolution up to Full HD 60Hz
• 1 x HDMI 2.1 TMDS/FRL 8G Compatible, supports HDR,
HDCP 2.3 and max. resolution up to 4K 120Hz
Audio • 7.1 CH HD Audio (Realtek ALC897 Audio Codec)

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A620M-C
LAN • Gigabit LAN 10/100/1000 Mb/s
• Realtek RTL8111H
Wireless
LAN
• 802.11ax Wi-Fi 6E Module
• Supports IEEE 802.11a/b/g/n/ac/ax
• Supports Dual-Band 2x2 with extended 6GHz band* sup-
port
* Wi-Fi 6E (6GHz band) will be supported by Microso® Win-
dows® 11. e availability will depend on the dierent regula-
tion status of each country and region. It will be activated (for
supported countries) through Windows Update and soware
updates once available.
* A 6GHz compatible router is required for 6E functionality.
• 2 antennas to support 2 (Transmit) x 2 (Receive) diversity
technology
• Supports Bluetooth 5.2 + High speed class II
• Supports MU-MIMO
USB • 1 x USB 3.2 Gen2 Type-C (Rear)
• 1 x USB 3.2 Gen2 Type-A (Rear)
• 1 x USB 3.2 Gen1 Type-C (Front)
• 6 x USB 3.2 Gen1 (2 Rear, 4 Front)
• 8 x USB 2.0 (4 Rear, 4 Front)
* All USB ports support ESD Protection
Rear Panel
I/O
• 2 x Antenna Ports
• 1 x HDMI Port
• 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s)
• 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s)
• 2 x USB 3.2 Gen1 Ports
• 4 x USB 2.0 Ports
• 1 x RJ-45 LAN Port
• 1 x BIOS Flashback Button
• HD Audio Jacks: Line in / Front Speaker / Microphone

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Storage CPU:
• 1 x Hyper M.2 Socket (M2_1, Key M), supports type
2260/2280 PCIe Gen4x4 (64 Gb/s) mode*
Chipset:
• 1 x M.2 Socket (M2_2, Key M), supports type 2260/2280
PCIe Gen3x2 (16 Gb/s) mode*
• 1 x M.2 Socket (M2_3, Key M), supports type 2260/2280
PCIe Gen3x2 (16 Gb/s) mode*
• 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
• Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe
storage devices*
* Requires additional M.2 NVMe expansion cards to support
RAID 10
Connector • 1 x eDP Signal Connector
• 1 x SPI TPM Header
• 1 x Power LED and Speaker Header
• 1 x RGB LED Header*
• 3 x Addressable LED Headers**
• 1 x CPU Fan Connector (4-pin)***
• 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan
Speed Control)****
• 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 4 pin 12V Power Connector
• 1 x Front Panel Audio Connector
• 2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
• 2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
• 1 x Front Panel Type C USB 3.2 Gen1 Header
* Supports in total up to 12V/3A, 36W LED Strip
** Support in total up to 5V/3A, 15W LED Strip
*** CPU_FAN1 supports the fan power up to 1A (12W).
**** CPU_FAN2/WP supports the fan power up to 2A (24W).

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A620M-C
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.
* For detailed product information, please visit our website: http://www.asrock.com
***** CHA_FAN1~3/WP support the fan power up to 2A (24W).
***** CPU_FAN2/WP and 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)
• CEC Tier II ready

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1.3 Motherboard Layout
Top Side View

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A620M-C
Back Side View

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No. Description
1 8 pin 12V Power Connector (ATX12V1)
2 4 pin 12V Power Connector (ATX12V2)
3 CPU Fan Connector (CPU_FAN1)
4 2 x 288-pin DDR5 DIMM Slots (DDR5_A1, DDR5_B1)
5 2 x 288-pin DDR5 DIMM Slots (DDR5_A2, DDR5_B2)
6 Addressable LED Header (ADDR_LED3)
7 RGB LED Header (RGB_LED1)
8 ATX Power Connector (ATXPWR1)
9 Front Panel Type C USB 3.2 Gen1 Header (USB32_TC2)
10 SATA3 Connector (SATA3_1)
11 SATA3 Connector (SATA3_2)
12 USB 3.2 Gen1 Header (USB32_4_5)
13 SPI TPM Header (SPI_TPM_J1)
14 SATA3 Connectors (SATA3_4)(Upper), (SATA3_3)(Lower)
15 System Panel Header (PANEL1)
16 Power LED and Speaker Header (SPK_PLED1)
17 Clear CMOS Jumper (CLRCMOS1)
18 USB 3.2 Gen1 Header (USB32_6_7)
19 Post Status Checker (PSC)
20 Chassis/Water Pump Fan Connector (CHA_FAN3/WP)
21 USB 2.0 Header (USB_5_6)
22 USB 2.0 Header (USB_7_8)
23 Chassis/Water Pump Fan Connector (CHA_FAN2/WP)
24 Chassis/Water Pump Fan Connector (CHA_FAN1/WP)
25 ddressable LED Header (ADDR_LED1)
26 ddressable LED Header (ADDR_LED2)
27 Front Panel Audio Header (HD_AUDIO1)
28 CPU/Water Pump Fan Connector (CPU_FAN2/WP)
29 eDP Signal Connector (EDP1)

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A620M-C
1.4 I/O Panel
No. Description No. Description
1 LAN RJ-45 Port* 7 USB 2.0 Ports (USB_1234)
2 Line In (Light Blue)** 8 USB 3.2 Gen2 Type-A Port (USB32_1)
3 Front Speaker (Lime)** 9 USB 3.2 Gen2 Type-C Port (USB32_TC1)
4 Microphone (Pink)** 10 BIOS Flashback Button
5 Antenna Ports 11 HDMI Port
6 USB 3.2 Gen1 Type-A Ports (USB32_23)
** 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
10 46 5
11
3
2
7
8
9
1
* 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

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1.5 Block Diagram
Channel B Channel A
DDR5 Slot x2
DDR5 Slot x2
AZ(HD Audio)
SPI eSPI
SIO NCT6796D-S Flash ROM Audio Codec ALC897 3
PCIe x16 Gen4 Slot
x4 Gen5
M.2(PCIe x4)
PCIe x4 Gen4 BUS
1st AMD PROM21 Chipset
AMD AM5 Processor LGA1718
DP1
HDMI Port
Rear USB 2.0 4 port
x16 Gen4 x1 10Gb/s
Rear USB 3.2 Gen2 Type A
10Gb/s
Rear USB 3.2 Gen2 Type C
ReDriver5Gb/s
Rear USB 3.2 Gen1 1 port
x2 Gen3
PCIe x2 Slot
x1
Realtek RTL8111H 1G LAN
Key E WiFi
Front USB 2.0 4 port
480Mb/s
M.2(PCIe x4 Gen4)
x2 Gen3
SATA 4 port
SATA 6Gb 5Gb/s
Rear USB 3.2 Gen1 1 port
480Mb/s
ReDriver
USB2.0 Hub GL852
5Gb/s
Front USB 3.2 Gen1 4 port
5Gb/s
Front USB 3.2 Gen1 Type C M.2(PCIe x2 Gen3)/SATA
x2 Gen3 x1 Gen3
PCIe x1 Slot
x1 Gen3
PCIe x1 Slot
DP0
eDP Port
USB3.0 Hub ASM1074

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A620M-C
1.6 802.11ax Wi-Fi 6E Module and ASRock WiFi 2.4/5/6 GHz
Antennas
802.11ax Wi-Fi 6E + BT Module
is motherboard comes with an exclusive 802.11 a/b/g/n/ac/ax Wi-Fi 6E + BT
module that oers support for 802.11 a/b/g/n/ac/ax Wi-Fi 6E connectivity standards
and Bluetooth. Wi-Fi 6E + BT module is an easy-to-use wireless local area network
(WLAN) adapter to support Wi-Fi 6E + BT. Bluetooth standard features Smart Ready
technology that adds a whole new class of functionality into the mobile devices.
BT also includes Low Energy Technology and ensures extraordinary low power
consumption for PCs.
* e transmission speed may vary according to the environment.
* Wi-Fi 6E (6GHz band) will be supported by Microso® Windows® 11. e availability
will depend on the dierent regulation status of each country and region. It will be
activated (for supported countries) through Windows Update and soware updates
once available.
* A 6GHz compatible router is required for 6E functionality.

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WiFi Antennas Installation Guide
Step 1
Prepare the WiFi 2.4/5/6 GHz Antennas that
come with the package.
Step 2
Connect the two WiFi 2.4/5/6 GHz Antennas
to the antenna connectors. Turn the antenna
clockwise until it is securely connected.
Step 3
Set the WiFi 2.4/5/6 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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A620M-C
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
components. Failure to do so may cause physical injuries 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
1. Before you insert the 1718-Pin CPU into the socket, please check if the PnP cap
is on the socket, if the CPU surface is unclean, or if there are any bent pins in the
socket. Do not force to insert the CPU into the socket if above situation is found.
Otherwise, the CPU will be seriously damaged.
2. Unplug all power cables before installing the CPU.
Tutorial Video
Turn your CPU to the correct orientation before opening
the CPU socket cover.

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A620M-C
Turn your CPU to the correct orientation before opening
the CPU socket cover.
Carefully place the CPU in as at as
possible. Do not drop it.
4
12
A
B
3

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6
7
5
Please save the cover if the processor is removed. e cover must be placed if you wish
to return the motherboard for aer service.
Make sure the black cover plate
is always in place until it pops o
when closing the socket lever.
Make sure the CPU is aligned with the
socket before locking it into place.