Version 1.0
Published April 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 identification or explanation and to the owners’ benefit, without intent to
infringe.
Disclaimer:
Specifications 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 fitness for a particular purpose.
In no event shall ASRock, its directors, officers, employees, or agents be liable for any indirect, special, incidental, or consequential damages (including damages for loss of profits, 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.
This 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
The 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 : +886-2-28965588 ext.123 (Standard International call charges apply)
The terms HDMI® and HDMI High-Definition Multimedia Interface, and the HDMI logo are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries.
Contents
Chapter 1 Introduction |
1 |
|
1.1 |
Package Contents |
1 |
1.2 |
Specifications |
2 |
1.3 |
Motherboard Layout |
7 |
1.4 |
I/O Panel |
9 |
Chapter 2 Installation |
11 |
|
2.1 |
Installing the CPU |
12 |
2.2 |
Installing the CPU Fan and Heatsink |
14 |
2.3 |
Installing Memory Modules (DIMM) |
22 |
2.4 |
Expansion Slots (PCI Express Slots) |
25 |
2.5 |
Jumpers Setup |
26 |
2.6 |
Onboard Headers and Connectors |
27 |
2.7 |
Clear CMOS Button |
33 |
2.8 |
Post Status Checker |
34 |
2.9 |
CrossFireXTM and Quad CrossFireXTM Operation Guide |
35 |
2.9.1 |
Installing Two CrossFireXTM-Ready Graphics Cards |
35 |
2.9.2 |
Driver Installation and Setup |
37 |
2.10 |
M.2 WiFi/BT Module Installation Guide (M2_3) |
38 |
2.11 |
M.2_SSD (NGFF) Module Installation Guide (M2_1) |
40 |
2.12 |
M.2_SSD (NGFF) Module Installation Guide (M2_2) |
43 |
Chapter 3 Software and Utilities Operation |
46 |
|
3.1 |
Installing Drivers |
46 |
3.2 |
ASRock Motherboard Utility (A-Tuning) |
47 |
3.2.1 |
Installing ASRock Motherboard Utility (A-Tuning) |
47 |
3.2.2 |
Using ASRock Motherboard Utility (A-Tuning) |
47 |
3.3 |
ASRock Live Update & APP Shop |
50 |
3.3.1 |
UI Overview |
50 |
3.3.2 |
Apps |
51 |
3.3.3 |
BIOS & Drivers |
54 |
3.3.4 |
Setting |
55 |
3.4 |
Nahimic Audio |
56 |
3.5 |
ASRock Polychrome SYNC |
57 |
Chapter 4 UEFI SETUP UTILITY |
60 |
|
4.1 |
Introduction |
60 |
4.1.1 |
UEFI Menu Bar |
60 |
4.1.2 |
Navigation Keys |
61 |
4.2 |
Main Screen |
62 |
4.3 |
OC Tweaker Screen |
63 |
4.4 |
Advanced Screen |
67 |
4.4.1 |
CPU Configuration |
68 |
4.4.2 |
Onboard Devices Configuration |
69 |
4.4.3 |
Storage Configuration |
71 |
4.4.4 |
ACPI Configuration |
72 |
4.4.5 |
Trusted Computing |
73 |
4.4.6 |
AMD CBS |
74 |
4.4.7 |
AMD PBS |
75 |
4.4.8 |
AMD Overclocking |
76 |
4.5 |
Tools |
77 |
4.6 |
Hardware Health Event Monitoring Screen |
78 |
4.7 |
Security Screen |
81 |
4.8 |
Boot Screen |
82 |
4.9 |
Exit Screen |
85 |
B550M Steel Legend
Chapter 1 Introduction
Thank you for purchasing ASRock B550M Steel Legend 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.
In this documentation, Chapter 1 and 2 contains the introduction of the motherboard and step-by-step installation guides. Chapter 3 contains the operation guide of the software and utilities. Chapter 4 contains the configuration guide of the BIOS setup.
Because the motherboard specifications and the BIOS software might be updated, the content of this documentation will be subject to change without notice. In case any modifications 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 specific information about the model you are using. You may find the latest VGA cards and CPU support list on ASRock’s website as well. ASRock website http://www.asrock.com.
1.1 Package Contents
•ASRock B550M Steel Legend Motherboard (Micro ATX Form Factor)
•ASRock B550M Steel Legend Quick Installation Guide
•ASRock B550M Steel Legend Support CD
•2 x Serial ATA (SATA) Data Cables (Optional)
•2 x Screws for M.2 Socket (Optional)
English
1
English
1.2 Specifications
Platform |
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Micro ATX Form Factor |
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2oz Copper PCB |
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CPU |
• |
Supports 3rd Gen AMD AM4 Ryzen™ / future AMD Ryzen™ |
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Processors (3000 and 4000 Series Processors)* |
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* Not compatible with AMD Ryzen™ 5 3400G and Ryzen™ 3 |
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3200G. |
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Digi Power design |
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• 10 Power Phase design |
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Chipset |
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AMD B550 |
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Memory |
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Dual Channel DDR4 Memory Technology |
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• 4 x DDR4 DIMM Slots |
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• AMD Ryzen series CPUs (Matisse) support DDR4 |
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4533+(OC)/4466(OC)/4400(OC)/4333(OC)/4266(OC)/ |
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4200(OC)/4133(OC)/4000(OC)/3866(OC)/3800(OC)/3733 |
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(OC)/3600(OC)/3466(OC)/3200/2933/2667/2400/2133 ECC |
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& non-ECC, un-buffered memory* |
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• AMD Ryzen series APUs (Renoir) support DDR4 4733+ |
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(OC)/4666(OC)/4600(OC)/4533(OC)/4466(OC)/ |
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4400(OC)/4333(OC)/4266(OC)/4200(OC)/4133(OC)/ |
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4000(OC)/3866(OC)/3800(OC)/3733(OC)/3600(OC)/ |
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3466(OC)/3200/2933/2667/2400/2133 ECC & non-ECC, un- |
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buffered memory* |
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* Please refer to Memory Support List on ASRock’s website for |
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more information. (http://www.asrock.com/) |
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* Please refer to page 22 for DDR4 UDIMM maximum |
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frequency support. |
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• Max. capacity of system memory: 128GB |
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• Supports Extreme Memory Profile (XMP) memory modules |
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• 15μ Gold Contact in DIMM Slots |
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Expansion |
AMD Ryzen series CPUs (Matisse) |
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Slot |
• |
2 x PCI Express x16 Slots (PCIE1: Gen4x16 mode; PCIE3: |
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Gen3 x4 mode)* |
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AMD Ryzen series APUs (Renoir) |
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• 2 x PCI Express x16 Slots (PCIE1: Gen3x16 mode; PCIE3: |
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Gen3 x4 mode)* |
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2 |
* Supports NVMe SSD as boot disks |
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• |
1 x PCI Express 3.0 x1 Slot |
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B550M Steel Legend
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• Supports AMD Quad CrossFireXTM and CrossFireXTM |
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• 15μ Gold Contact in VGA PCIe Slot (PCIE1) |
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• 1 x M.2 Socket (Key E), supports type 2230 WiFi/BT |
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module |
Graphics |
• Integrated AMD RadeonTM Vega Series Graphics in Ryzen |
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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.
*The 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 (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 Ports
•Supports 4K Ultra HD (UHD) playback with HDMI 2.1 and DisplayPort 1.4 Ports
•Supports Microsoft PlayReady®
Audio |
• |
7.1 CH HD Audio with Content Protection (Realtek |
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ALC1200 Audio Codec) |
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• Premium Blu-ray Audio support |
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• |
Supports Surge Protection |
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PCB Isolate Shielding |
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• Individual PCB Layers for R/L Audio Channel |
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Gold Audio Jacks |
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• |
Nahimic Audio |
English
3
English
LAN |
• |
2.5 Gigabit LAN 10/100/1000/2500 Mb/s |
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• |
Dragon RTL8125BG |
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• Supports Dragon 2.5G LAN Software |
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- Smart Auto Adjust Bandwidth Control |
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- Visual User Friendly UI |
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- Visual Network Usage Statistics |
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- Optimized Default Setting for Game, Browser, and |
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Streaming Modes |
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- User Customized Priority Control |
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• Supports Wake-On-LAN |
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• |
Supports Lightning/ESD Protection |
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• Supports Energy Efficient Ethernet 802.3az |
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• |
Supports PXE |
Rear Panel |
• |
2 x Antenna Ports (on I/O Panel Shield) |
I/O |
• |
1 x PS/2 Mouse/Keyboard Port |
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• 1 x HDMI Port |
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• 1 x DisplayPort 1.4 |
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• 1 x Optical SPDIF Out Port |
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• 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) (Supports ESD |
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Protection) |
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• 1 x USB 3.2 Gen2 Type-C Port (10 Gb/s) (Supports ESD |
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Protection) |
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• 4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports |
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ESD Protection) |
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• 2 x USB 2.0 Ports (Supports ESD Protection) |
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• 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED |
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LED) |
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• 1 x Clear CMOS Button |
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• HD Audio Jacks: Rear Speaker / Central / Bass / Line in / |
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Front Speaker / Microphone (Gold Audio Jacks) |
Storage |
• |
6 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, |
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RAID 1 and RAID 10), NCQ, AHCI and Hot Plug* |
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* M2_2 and SATA3_5_6 share lanes. If either one of them is in |
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use, the other one will be disabled. |
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• 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)**
4
B550M Steel Legend
•1 x M.2 Socket (M2_2), supports M Key type 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 SPI TPM Header |
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• 1 x Power LED and Speaker Header |
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• 2 x RGB LED Headers |
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* Support in total up to 12V/3A, 36W LED Strip |
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• 2 x Addressable LED Headers |
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* Support in total up to 5V/3A, 15W LED Strip |
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• 1 x CPU Fan Connector (4-pin) |
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* The CPU Fan Connector supports the CPU fan of maximum |
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1A (12W) fan power. |
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• 1 x CPU/Water Pump Fan Connector (4-pin) (Smart Fan |
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Speed Control) |
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• 4 x Chassis/Water Pump Fan Connectors (4-pin) (Smart |
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Fan Speed Control) |
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* The Chassis/Water Pump Fan supports the water cooler fan |
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of maximum 2A (24W) fan power. |
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* CPU_FAN2/WP, CHA_FAN1/WP, CHA_FAN2/WP, CHA_ |
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FAN3/WP and CHA_FAN4/WP can auto detect if 3-pin or |
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4-pin fan is in use. |
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• 1 x 24 pin ATX Power Connector (Hi-Density Power Con- |
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nector) |
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• 1 x 8 pin 12V Power Connector (Hi-Density Power Connec- |
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tor) |
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• 1 x 4 pin 12V Power Connector (Hi-Density Power Connec- |
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tor) |
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• 1 x Front Panel Audio Connector |
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• 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports |
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ESD Protection) |
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• 2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports) |
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(Supports ESD Protection) |
English
5
BIOS |
• |
AMI UEFI Legal BIOS with GUI support |
Feature |
• |
Supports “Plug and Play” |
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• ACPI 5.1 compliance wake up events |
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• |
Supports jumperfree |
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SMBIOS 2.3 support |
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• CPU, CPU VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_ |
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S5, 2.5V_PROM, +1.8VSB, VDDP Voltage Multi-adjustment |
Hardware |
• |
Temperature Sensing: CPU, CPU/Water Pump, Chassis/ |
Monitor |
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Water Pump Fans |
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• Fan Tachometer: CPU, CPU/Water Pump, Chassis/Water |
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Pump Fans |
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• Quiet Fan (Auto adjust chassis fan speed by CPU tempera- |
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ture): CPU, CPU/Water Pump, Chassis/Water Pump Fans |
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• Fan Multi-Speed Control: CPU, CPU/Water Pump, |
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Chassis/Water Pump Fans |
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• Voltage monitoring: +12V, +5V, +3.3V, CPU Vcore, CPU |
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VDDCR_SOC, DRAM, VPPM, 1.05V_PROM_S5, +1.8V, |
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VDDP |
OS |
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Microsoft® Windows® 10 64-bit |
Certifica- |
• |
FCC, CE |
tions |
• |
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 affect 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.
English
6
B550M Steel Legend
1.3 Motherboard Layout
31
1 |
2 |
3 |
4 |
5 |
6 |
CLRC
BTN1
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ATX12V1 |
ATX12V2 |
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HDMI1 |
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DP1 |
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PS2 Keyboard/ Mouse |
USB 2.0 |
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T: USB1 |
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B: USB2 |
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USB 3.2 Gen2 |
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T: USB31_TA_1 |
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B: USB31_TC_1 |
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USB 3.2 Gen1 |
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T: USB3_1 |
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B: USB3_2 |
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USB 3.2 Gen1 |
RJ- |
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45LA |
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B: USB3_4 |
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T: USB3_3 |
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CHA_FAN1/WP |
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AM4 SOCKET
SPDIF Optical Bottom: |
REARSPK |
Center: |
Central/Bass |
Top: |
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SPI_TPM_J1 |
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1 |
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MI Bottom: CIN |
FRONT |
Center: |
LINEIN |
Top: |
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PCIE1 |
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LAN |
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Super |
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1 |
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M2 |
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I/O |
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PCIE2 |
3 |
CMOS |
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NUT1 |
M2 |
Battery |
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RoHS |
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PCIE3 |
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AUDIO |
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CODEC |
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CLRCMOS1 |
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HD_AUDIO1 |
1 |
CHA_FAN3 CHA_FAN2 |
USB_5_6 |
USB_3_4 |
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/WP |
/WP |
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RGB_LED2 |
ADDR_LED2 |
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1 |
1 |
1 |
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1 |
1 |
CPU_FAN2/WP
RGB_LED1
CPU_FAN1
1
1
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ADDR_LED1 |
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bit,288-pinmodule) |
bit,288-pinmodule) |
bit,288-pinmodule) |
bit,288-pinmodule) |
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ATXPWR1 |
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DDR4 A1(64 |
DDR4 A2(64 |
DDR4 B1(64 |
DDR4 B2(64 |
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USB3 1 2 |
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F_ |
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1 |
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SATA3 1 |
SATA3 2 |
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AMD |
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SATA3 4 |
SATA3 3 |
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Promontory |
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B550 |
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SATA3 6 |
SATA3 5 |
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M2 2 |
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CHA_FAN4/WP |
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SPK_PLED1 |
PANEL1 |
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F_USB3_3_4 |
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PLED PWRBTN |
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BOOT VGA |
DRAM |
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CPU |
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1 |
1HDLED RESET |
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30 |
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17 |
7
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English
7
No. Description
18 pin 12V Power Connector (ATX12V1)
24 pin 12V Power Connector (ATX12V2)
3CPU Fan Connector (CPU_FAN1)
4CPU/Water Pump Fan Connector (CPU_FAN2/WP)
52 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
62 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
7RGB LED Header (RGB_LED1)
8Addressable LED Header (ADDR_LED1)
9ATX Power Connector (ATXPWR1)
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10 |
USB 3.2 Gen1 Header (F_USB3_1_2) |
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11 |
SATA3 Connector (SATA3_2) |
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12 |
SATA3 Connector (SATA3_1) |
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13 |
SATA3 Connector (SATA3_4) |
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14 |
SATA3 Connector (SATA3_3) |
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15 |
SATA3 Connector (SATA3_5) |
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16 |
SATA3 Connector (SATA3_6) |
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17 |
System Panel Header (PANEL1) |
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18 |
Power LED and Speaker Header (SPK_PLED1) |
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19 |
USB 3.2 Gen1 Header (F_USB3_3_4) |
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20 |
Chassis/Water Pump Fan Connector (CHA_FAN4/WP) |
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21 |
Post Status Checker (PSC) |
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22 |
SPI TPM Header (SPI_TPM_J1) |
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23 |
USB 2.0 Header (USB_3_4) |
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24 |
USB 2.0 Header (USB_5_6) |
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25 |
Chassis/Water Pump Fan Connector (CHA_FAN2/WP) |
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26 |
Chassis/Water Pump Fan Connector (CHA_FAN3/WP) |
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27 |
Clear CMOS Jumper (CLRCMOS1) |
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28 |
Thunderbolt AIC Connector (TB1) |
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29 |
Addressable LED Header (ADDR_LED2) |
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30 |
RGB LED Header (RGB_LED2) |
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English |
31 |
Front Panel Audio Header (HD_AUDIO1) |
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32 |
Chassis/Water Pump Fan Connector (CHA_FAN1/WP) |
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8
B550M Steel Legend
1.4 I/O Panel
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7 |
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17 |
16 |
15 |
14 |
12 |
11 |
10 |
9 |
8 |
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13 |
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No. |
Description |
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No. |
Description |
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1 |
USB 2.0 Ports (USB_12)* |
11 |
USB 3.2 Gen1 Ports |
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2 |
Antenna Ports |
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(USB3_12) |
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(on I/O Panel Shield) |
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12 |
USB 3.2 Gen2 Type-A Port |
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3 |
LAN RJ-45 Port** |
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(USB31_TA_1) |
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4 |
Central / Bass (Orange) |
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13 |
USB 3.2 Gen2 Type-C Port |
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5 |
Rear Speaker (Black) |
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(USB31_TC_1) |
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6 |
Line In (Light Blue) |
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14 |
PS/2 Mouse/Keyboard Port |
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7 |
Front Speaker (Lime)*** |
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15 |
DisplayPort 1.4 |
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8 |
Microphone (Pink) |
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16 |
HDMI Port |
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9 |
Optical SPDIF Out Port |
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17 |
Clear CMOS Button |
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10USB 3.2 Gen1 Ports (USB3_34)
*Please note that the USB_2 consumes auxiliary power (+5VSB) while the other USB ports consume DUAL Power (+5VDUAL). The USB_2 is optimal for connecting the USB Type speaker and headset..
English
9
** There are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.
ACT/LINK LED
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SPEED LED |
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LAN Port |
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Activity / Link LED |
Speed LED |
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Status |
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Description |
Status |
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Description |
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Off |
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No Link |
Off |
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10Mbps connection |
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Blinking |
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Data Activity |
Orange |
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100Mbps/1Gbps |
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connection |
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On |
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Link |
Green |
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2.5Gbps connection |
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*** If you use a 2-channel speaker, please connect the speaker’s plug into “Front Speaker Jack”. See the table below for connection details in accordance with the type of speaker you use.
Audio Output |
Front Speaker |
Rear Speaker |
Central / Bass |
Line In |
Channels |
(No. 7) |
(No.5) |
(No. 4) |
(No. 6) |
2 |
V |
-- |
-- |
-- |
4 |
V |
V |
-- |
-- |
6 |
V |
V |
V |
-- |
8 |
V |
V |
V |
V |
English
10
B550M Steel Legend
Chapter 2 Installation
This is a Micro ATX form factor motherboard. Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits 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 overtighten the screws! Doing so may damage the motherboard.
English
11
2.1 Installing the CPU
Unplug all power cables before installing the CPU.
1
2
English
12
B550M Steel Legend
3
English
13
2.2 Installing the CPU Fan and Heatsink
After 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 off the power or remove the power cord before changing a CPU or heatsink.
Installing the CPU Box Cooler SR1
1
2
English
14
B550M Steel Legend
3
4
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N1 |
FA |
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U_ |
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CP |
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English
15
Installing the AM4 Box Cooler SR2
1
2
English
16
B550M Steel Legend
3
English
17
4
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N1 |
FA |
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_ |
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PU |
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C |
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*The diagrams shown here are for reference only. The headers might be in a different position on your motherboard.
English
18
B550M Steel Legend
Installing the AM4 Box Cooler SR3
1
2
English
19
3
4
English
20
B550M Steel Legend
5
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1 |
N |
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_FA |
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PU |
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C |
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6
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2 |
+12V |
RG |
ED |
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L |
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_ |
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B |
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*The diagrams shown here are for reference only. The headers might be in a different position on your motherboard.
English
21
2.3 Installing Memory Modules (DIMM)
This motherboard provides four 288-pin DDR4 (Double Data Rate 4) DIMM slots, and supports Dual Channel Memory Technology.
1.For dual channel configuration, 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 Memory Technology with only one or three 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.
4.We suggest that you install the memory modules on DDR4_A2 and DDR4_B2 first for better DRAM compatibility on 2 DIMMs configuration.
AMD non-XMP Memory Frequency Support
Ryzen Series CPUs (Matisse):
|
UDIMM Memory Slot |
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Frequency |
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A1 |
A2 |
B1 |
B2 |
(Mhz) |
- |
SR |
- |
- |
3200 |
- |
DR |
- |
- |
3200 |
- |
SR |
- |
SR |
3200 |
- |
DR |
- |
DR |
3200 |
SR |
SR |
SR |
SR |
2933 |
SR/DR |
DR |
SR/DR |
DR |
2667 |
SR/DR |
SR/DR |
SR/DR |
SR/DR |
2667 |
English
22
B550M Steel Legend
Ryzen Series APUs (Renoir):
|
UDIMM Memory Slot |
|
Frequency |
|
A1 |
A2 |
B1 |
B2 |
(Mhz) |
- |
SR |
- |
- |
3200 |
- |
DR |
- |
- |
3200 |
- |
SR |
- |
SR |
3200 |
- |
DR |
- |
DR |
3200 |
SR |
SR |
SR |
SR |
2933 |
SR/DR |
DR |
SR/DR |
DR |
2667 |
SR/DR |
SR/DR |
SR/DR |
SR/DR |
2667 |
SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label
DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label
English
23
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