Motherboard PRIME B550M-A (WI-FI)
E16551 First Edition April 2020 Copyright © 2020 ASUSTeK COMPUTER INC. All Rights Reserved. No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).
Contents Safety information....................................................................................................... iv About this guide........................................................................................................... v Package contents........................................................................................................ vi PRIME B550M-A (WI-FI) specifications summary.................................................... vi Product introduction 1.
Safety information Electrical safety • To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system. • When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
About this guide This user guide contains the information you need when installing and configuring the motherboard. How this guide is organized This guide contains the following parts: • Chapter 1: Product introduction This chapter describes the features of the motherboard and the new technology it supports. It includes descriptions of the switches, jumpers, and connectors on the motherboard.
Package contents Check your motherboard package for the following items. Motherboard 1 x PRIME B550M-A (WI-FI) motherboard Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x I/O Shield 1 x M.2 SSD screw package 1 x ASUS 2x2 dual band Wi-Fi moving antenna Application DVD 1 x Support DVD Documentation 1 x User manual If any of the above items is damaged or missing, contact your retailer.
PRIME B550M-A (WI-FI) specifications summary Intel® Wi-Fi 6 AX200 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) support 1024QAM/OFDMA/MU-MIMO Supports up to 2.4Gbps max data rate Wireless & Bluetooth Support 2.4/5GHz Dual-Band Supports channel bandwidth: HT20/HT40/HT80/HT160 Supports PCIe interface Bluetooth v5.1* *Bluetooth v5.1 function will be ready in Windows 10 build 19041 or later. Rear USB (Total 6 ports) 2 x USB 3.2 Gen 2 ports (2 x Type-A) USB 4 x USB 3.
PRIME B550M-A (WI-FI) specifications summary USB 1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports 2 x USB 2.0 headers support additional 4 USB 2.
PRIME B550M-A (WI-FI) specifications summary UEFI BIOS ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - ASUS UEFI BIOS EZ Mode Software Features BIOS 256 Mb Flash ROM, UEFI AMI BIOS Manageability WOL by PME, PXE Operating System Windows® 10 - 64 bit Form Factor mATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm) S pecifications are subject to change without notice. Refer to the ASUS website for the latest specifications.
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1 Product introduction 1.1 Before you proceed Take note of the following precautions before you install motherboard components or change any motherboard settings. 1.2 • Unplug the power cord from the wall socket before touching any component. • Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity.
1.2.1 Layout contents 1. CPU socket The motherboard comes with an AMD Socket AM4 designed for 3rd Gen AMD Ryzen™ Processors. For more details, refer to Central Processing Unit (CPU). 2. DDR4 DIMM slots The motherboard comes with Dual Inline Memory Modules (DIMM) slots designed for DDR4 (Double Data Rate 4) memory modules. For more details, refer to System memory. 3. Expansion slots This motherboard supports one PCIe x16 graphics card and two PCIe 3.
7. SATA 6Gb/s ports The SATA 6Gb/s ports allow you to connect SATA devices such as optical disc drives and hard disk drives via a SATA cable. 8. USB 3.2 Gen 1 header The USB 3.2 Gen 1 header allows you to connect a USB 3.2 Gen 1 module for additional USB 3.2 Gen 1 ports. The USB 3.2 Gen 1 header provides data transfer speeds of up to 5 Gb/s.
Before you install or remove any component, ensure that the ATX power supply is switched off or the power cord is detached from the power supply. Failure to do so may cause severe damage to the motherboard, peripherals, or components. • Actual lighting and color will vary with LED strip. • If your LED strip does not light up, check if the RGB LED extension cable and the RGB LED strip are connected in the correct orientation, and the 12V connector is aligned with the 12V header on the motherboard.
16. Speaker header +5V GND GND Speaker Out SPEAKER The 4-pin header is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings. 17. 10-1 pin System Panel header PIN 1 This header supports several chassis-mounted functions. System power LED (2-pin +PWR_LED-) F_PANEL • Hard disk drive activity LED (2-pin +HDD_LED-) This 2-pin header is for the HDD Activity LED. Connect the HDD Activity LED cable to this header.
1.2.2 Rear panel connectors 1 2 6 7 8 9 10 3 4 6 11 5 1. PS/2 Keyboard/Mouse combo port. This port is for a PS/2 keyboard or mouse. 2. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other VGA-compatible devices. 3. Ethernet port. This port allows Gigabit connection to a Local Area Network (LAN) through a network hub. Refer to the table below for the Ethernet port LED indications.
9. USB 3.2 Gen 2 (up to 10Gbps) ports (teal blue, Type A). These 9-pin Universal Serial Bus 3.2 (USB 3.2) ports are for USB 3.2 Gen 2 devices. 10. Intel® Wi-Fi 6 AX200 ports. These ports connect to Wi-Fi antennas. 11. • Ensure that the ASUS 2x2 dual band Wi-Fi antenna is securely installed to the Wi-Fi ports. • Ensure that the antenna is at least 20 cm away from all persons. Microphone port (pink). This port connects a microphone.
1.3 Central Processing Unit (CPU) The motherboard comes with an AMD Socket AM4 designed for 3rd Gen AMD Ryzen™ Processors. Unplug all power cables before installing the CPU. The AM4 socket has a different pinout design. Ensure that you use a CPU designed for the AM4 socket. The CPU fits in only one correct orientation.
1.4 System memory This motherboard comes with four Double Data Rate 4 (DDR4) Dual Inline Memory Module (DIMM) sockets. The figure illustrates the location of the DDR4 DIMM sockets: DIMM_A1 DIMM_A2* DIMM_B1 DIMM_B2* • • Channel Sockets Channel A DIMM_A1 & DIMM_A2* Channel B DIMM_B1 & DIMM_B2* You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration.
Installing a DIMM 1 2 A A B To remove a DIMM A B 1-10 Chapter 1: Product introduction
BIOS and RAID Support 2.1 2 Knowing BIOS The new ASUS UEFI BIOS is a Unified Extensible Interface that complies with UEFI architecture, offering a user-friendly interface that goes beyond the traditional keyboardonly BIOS controls to enable a more flexible and convenient mouse input. You can easily navigate the new UEFI BIOS with the same smoothness as your operating system. The term “BIOS” in this user manual refers to “UEFI BIOS” unless otherwise specified.
2.2 BIOS setup program Use the BIOS Setup to update the BIOS or configure its parameters. The BIOS screens include navigation keys and brief onscreen help to guide you in using the BIOS Setup program. Entering BIOS at startup To enter BIOS Setup at startup, press or during the Power-On Self Test (POST). If you do not press or , POST continues with its routines. Entering BIOS Setup after POST To enter BIOS Setup after POST: • Press ++ simultaneously.
2.3 ASUS EZ Flash 3 The ASUS EZ Flash 3 feature allows you to update the BIOS without using an OS‑based utility. Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu or press hotkey . To update the BIOS by USB: • This function can support devices such as a USB flash disk with FAT 32/16 format and single partition only.
2.4 ASUS CrashFree BIOS 3 The ASUS CrashFree BIOS 3 utility is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS file using a USB flash drive that contains the BIOS file. If you want to use the latest BIOS file, download the file at https://www.asus.com/support, and save it to a USB flash drive. Recovering the BIOS To recover the BIOS: 1. Turn on the system. 2.
2.5 RAID configurations The motherboard supports RAID 0, RAID1, and RAID10 configuration. For more information on configuring your RAID sets, please refer to the RAID Configuration Guide which you can find at https://www.asus.com/support, or by scanning the QR code. RAID definitions RAID 0 (Data striping) optimizes two identical hard disk drives to read and write data in parallel, interleaved stacks.
2-6 Chapter 2: BIOS and RAID Support
Appendix Notices FCC Compliance Information Responsible Party: Address: Phone / Fax No: Asus Computer International 48720 Kato Rd., Fremont, CA 94538, USA (510)739-3777 / (510)608-4555 Identification of the assembled product: INTEL® WI-FI 6 AX200 Identification of the modular components used in the assembly: Model Name: INTEL® WI-FI 6 AX200 FCC ID: PD9AX200NG This device complies with part 15 of the FCC Rules.
Compliance Statement of Innovation, Science and Economic Development Canada (ISED) This device complies with Innovation, Science and Economic Development Canada licence exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
Google™ License Terms Copyright© 2020 Google Inc. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Declaration of compliance for product environmental regulation ASUS follows the green design concept to design and manufacture our products, and makes sure that each stage of the product life cycle of ASUS product is in line with global environmental regulations. In addition, ASUS disclose the relevant information based on regulation requirements. Please refer to http://csr.asus.com/Compliance.
DO NOT throw the motherboard in municipal waste. This product has been designed to enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin indicates that the product (electrical and electronic equipment) should not be placed in municipal waste. Check local regulations for disposal of electronic products. DO NOT throw the mercury-containing button cell battery in municipal waste.
Simplified EU Declaration of Conformity ASUSTek Computer Inc. hereby declares that this device is in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU. Full text of EU declaration of conformity is available at https://www.asus.com/support/ The WiFi operating in the band 5150-5350MHz shall be restricted to indoor use for countries listed in the table below: Déclaration simplifiée de conformité de l’UE ASUSTek Computer Inc.
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ASUS contact information ASUSTeK COMPUTER INC. Address Telephone Fax Web site Technical Support Telephone Online support 1F., No. 15, Lide Rd., Beitou Dist., Taipei City 112, Taiwan +886-2-2894-3447 +886-2-2890-7798 https://www.asus.com +86-21-38429911 https://qr.asus.com/techserv ASUS COMPUTER INTERNATIONAL (America) Address 48720 Kato Rd., Fremont, CA 94538, USA Telephone +1-510-739-3777 Fax +1-510-608-4555 Web site https://www.asus.