Motherboard PRIME B550M-A WIFI II
E22625 Revised Edition v2 September 2023 Copyright © 2023 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 WIFI II specifications summary.....................................................
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 WIFI II motherboard Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x I/O Shield 1 x M.2 SSD screw package 1 x ASUS Wi-Fi moving antennas 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 WIFI II specifications summary Ethernet 1 x Realtek 1Gb Ethernet Wi-Fi 6 Wireless & Bluetooth 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Supports 2.4/5GHz frequency band Bluetooth v5.2 Rear USB (Total 6 ports) 2 x USB 3.2 Gen 2 ports (2 x Type-A) USB 4 x USB 3.2 Gen 1 ports (4 x Type-A) Front USB (Total 6 ports) 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 2.0 ports Realtek 7.
PRIME B550M-A WIFI II specifications summary Miscellaneous 1 x Addressable Gen 2 header 2 x AURA RGB headers 1 x Clear CMOS header Internal I/O Connectors 1 x COM Port header 1 x Front Panel Audio header (AAFP) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin System Panel header ASUS 5X PROTECTION III - DIGI+ VRM - LANGuard - Overvoltage Protection - SafeSlot Core - Stainless-Steel Back I/O Special Features ASUS Q-Design - Q-DIMM - Q-Slot ASUS Thermal Solution - VRM hea
PRIME B550M-A WIFI II specifications summary BIOS 256 Mb Flash ROM, UEFI AMI BIOS Manageability WOL by PME, PXE Operating System Windows® 11 64-bit Windows® 10 64-bit mATX Form Factor Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm) • Specifications are subject to change without notice. Refer to the ASUS website for the latest specifications.
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Chapter 1: Product Introduction 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 AMD Ryzen™ 5000 Series / 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop 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.
• AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes) • AMD Ryzen™ 5000 G-Series / 4000 G-Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes) • AMD B550 Chipset M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) 7.
11. AURA RGB headers The RGB headers allow you to connect RGB LED strips. The RGB headers support 5050 RGB multi-color LED strips (12V/G/R/B), with a maximum power rating of 3A (12V), and no longer than 3m. 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.
16. Speaker header +5V This header is for an additional Sony/Philips Digital Interface (S/PDIF) port. Connect the S/PDIF Out module cable to this header, then install the module to a slot opening at the back of the system chassis. SPDIFOUT GND SPDIF_OUT 15. S/PDIF Out header SPEAKER +5V GND GND Speaker Out The 4-pin header is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings. PIN 1 17.
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.
10. Wi-Fi ports. Connect the bundled ASUS Wi-Fi antenna connectors to these ports. 11. Microphone port (pink). This port connects a microphone. Refer to the audio configuration table on the next page for the function of the audio ports in 2, 4, 5.1, or 7.1-channel configuration. Audio 2, 4, 5.1 or 7.1-channel configuration Headset 2-channel Port * 4-channel 5.1-channel 7.
1.3 Central Processing Unit (CPU) The motherboard comes with an AMD Socket AM4 designed for AMD Ryzen™ 5000 Series / 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop 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 Knowing BIOS 2 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: • 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. Recovering the BIOS 1. Download the latest BIOS version for this motherboard from https://www.asus.com/support/. 2. Rename the BIOS file as P550MAW2.CAP and copy the renamed BIOS file to a USB flash drive. 3.
2.5 RAID configurations The motherboard comes with the RaidXpert2 Configuration Utility that supports RAID 0, RAID 1 and RAID 10 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 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.
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.
NCC: Wireless Statement 取得審驗證明之低功率射頻器材，非經核准，公司、商號或使用者均不得擅自變更頻率、 加大功率或變更原設計之特性及功能。低功率射頻器材之使用不得影響飛航安全及干擾合 法通信；經發現有干擾現象時，應 立即停用，並改善至無干擾時方得繼續使用。前述合 法通信，指依電信管理法規定作業之無線電通信。低功率射頻器材須忍受合法通信或工 業、科學及醫療用電波輻射性電機設備之干擾。 應避免影響附近雷達系統之操作。 Japan RF Equipment Statement 屋外での使用について 本製品は、5GHz帯域での通信に対応しています。電波法の定めにより5.2GHz、5.
EU RoHS This product complies with the EU RoHS Directive. For more details, see http://csr.asus.com/english/article.aspx?id=35. India RoHS This product complies with the “India E-Waste (Management) Rules, 2016” and prohibits use of lead, mercury, hexavalent chromium, polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs) in concentrations exceeding 0.1% by weight in homogenous materials and 0.
France sorting and recycling information FR Cet appareil et ses accessoires se recyclent À DÉPOSER EN MAGASIN À DÉPOSER EN DÉCHÈTERIE OU Points de collecte sur www.quefairedemesdechets.fr Privilégiez la répara�on ou le don de votre appareil ! Simplified UKCA Declaration of Conformity ASUSTek Computer Inc. hereby declares that this device is in compliance with the essential requirements and other relevant provisions of The Radio Equipment Regulations 2017 (S.I. 2017/1206).
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.
Forenklet EU-samsvarserklæring ASUSTek Computer Inc. erklærer herved at denne enheten er i samsvar med hovedsaklige krav og andre relevante forskrifter i direktivet 2014/53/EU. Fullstendig tekst for EU-samsvarserklæringen finnes på: https://www.asus.com/support/ Wi-Fi-området 5150–5350 MHz skal begrenses til innendørs bruk for landene som er oppført i tabellen: Uproszczona deklaracja zgodności UE Firma ASUSTek Computer Inc.
Warranty EN: ASUS Guarantee Information • ASUS offers a voluntary manufacturer’s Commercial Guarantee. • ASUS reserves the right to interpret the provisions of the ASUS Commercial Guarantee. • This ASUS Commercial Guarantee is provided independently and in addition to the statutory Legal Guarantee and in no way affects or limits the rights under the Legal Guarantee. CR: Informacije o ASUS jamstvu • ASUS dragovoljno nudi komercijalno proizvođačko jamstvo.
PG: Informações de Garantia ASUS • A ASUS oferece uma Garantia Comercial voluntária do fabricante. • A ASUS reserva o direito de interpretar as disposições da Garantia Comercial da ASUS. • Esta Garantia Comercial da ASUS é fornecida de forma independente além da Garantia Legal estatutária e não afeta nem limita de qualquer forma os direitos estabelecidos na Garantia Legal. Para consultar todas as informações sobre a garantia, visite https://www.asus.com/pt/support/.
ASUS contact information ASUSTeK COMPUTER INC. Address: 1F., No. 15, Lide Rd., Beitou Dist., Taipei City 112 ASUS COMPUTER INTERNATIONAL (America) Address: 48720 Kato Rd., Fremont, CA 94538, USA ASUS COMPUTER GmbH (Germany and Austria) Address: Harkortstrasse 21-23, 40880 Ratingen, Germany ASUSTeK (UK) LIMITED Address: 1st Floor, Sackville House, 143-149 Fenchurch Street, London, EC3M 6BL, England, United Kingdom Service and Support Visit our multi-language website at https://www.asus.
