PRIME B550M-A WIFI II mATX Motherboard w/ DDR4-3200, 7.1 Audio, Gigabit LAN, Dual NVMe M.2, Wi-Fi 6 802.11ax, BlueTooth v5.1
Product Info
ASUS PRIME B550M-A WIFI II Motherboard:
AMD B550 Micro ATX AM4 Motherboard w/ Dual M.2, PCIe 4.0, Wi-Fi 6, 1Gb Ethernet, HDMI, DVI-D, D-Sub, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB Lighting
PRIME Time
ASUS Prime series is expertly engineered to unleash the full potential of 5000 Series, 5000 G-Series, 4000 G-Series & 3000 Series AMD Ryzen CPUs and related Computer Hardware.
Boasting a robust power design via ASUS DIGI+ VRM & EPU technology, comprehensive cooling solutions and intelligent tuning options, ASUS Prime B550 Series Motherboards provide daily users, gamers and DIY PC Builders a range of performance tuning options via intuitive software and firmware features.
- AMD AM4 Socket: Ready for Powerful 5th, 4th & 3rd Gen AMD Ryzen™ Processors designed for AMD Socket AM4
- Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers, and Fan Xpert 2+ utility
- Ultrafast Connectivity: Dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A support
- Aura Sync RGB Lighting: Onboard addressable Gen 2 header and RGB headers for RGB LED strips, easily synced with Aura Sync-capable hardware


Features

Tune It Your Way
Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.
Intelligent Control
- EPU: All-around Energy Efficiency
With the Energy Processing Unit (EPU), you will enjoy system-wide power savings. The EPU automatically optimizes power consumption and maximizes savings with Away mode - Fan Xpert 2+: Flexible Cooling Controls
Fan Xpert 2+ software provides comprehensive control over system fans. Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS - Digi+ VRM Control: Precise Digital Power Control
The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It also allows you to fine-tune your CPU for ultimate stability and performance
UEFI BIOS
The renowned ASUS UEFI BIOS provides everything you need to configure, tweak and tune your system. It offers intelligently simplified options for PC DIY beginners, as well as comprehensive features for seasoned veterans.
- Advanced Tuning for Serious Tweakers
An intuitive Advanced mode offered via the UEFI lets you take complete control. A built-in search feature makes it easy to find options, and various Advanced functions let you intelligently make nuanced adjustments so you can dial in performance just the way you want.- Search Function
Quickly and easily find the option or setting you need - ASUS User Profile
Port configuration settings between different BIOS versions or share them with friends
- Search Function
- EZ Mode
EZ mode displays vital settings and stats and also offers guided wizards, drag-and-drop functionality, and one-click application of important settings - all to help you get your rig up and running in no time- Intuitive Graphical Fan Control
Fine-tune individual fan settings simply by dragging a curve with the mouse - EZ XMP
Improve DRAM performance with one click - Aura On/Off mode (Stealth)
Easily enable or disable Aura RGB lighting or every onboard LED, for a subdued aesthetic touch
- Intuitive Graphical Fan Control
Cool to the Core
Prime B550 series is engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.
- Heatsinks
VRM Heatsink and Thermal Pads - A VRM heatsink with underneath thermal pad improves heat transfer from the MOSFETs and chokes for better cooling performance. - Cooler by Design
Prime B550 series features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.- Multiple Temperature Sources
Each header can dynamically reference three thermal sensors. Fan Xpert 2+ allows you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks - Smart Protection
A dedicated integrated circuit protects each fan header from overheating and overcurrent - 4-Pin PWM/DC Fan
Each onboard chassis fan header supports PWM and DC mode
- Multiple Temperature Sources
Build on a Solid Foundation
Prime B550 motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options.
- NVMe PCIe 4.0 M.2 Storage
The M.2 (up to 64 Gbps) Slot supports up to 22110 length M.2s and provides NVMe SSD RAID support for an incredible performance boost. Create a RAID configuration with up to PCIe 4.0 storage device to enjoy the fastest data-transfer speeds on the 3rd Gen AMD Ryzen platform - WiFi 6
Intel® Wi-Fi 6 AX200 The Intel® Wi-Fi 6 AX200 module is compatible with the Dual Band 802.11ax standard and pushes theoretical peak bandwidth up to an incredible 2.4 Gbps. Perhaps more importantly for power users, it's optimized for more efficient operation on crowded networks with a lot of competing traffic. As a Bonus, you also get Bluetooth v5.2 so you can connect to a host of external wireless audio devices like Powered Speakers, EarBuds, etc. Pair your ASUS wireless Motherboard with an ASUS Wi-Fi 6 Router to fully experience the networking potential of Wi-Fi 6! - USB 3.2 Gen 2 Type-A
This Motherboard has numerous USB ports that support high-end rigs loaded with peripherals, including two rear-panel USB Type-A connectors with fast USB 3.2 Gen2 (10Gbps) connectivity when used with a compatible case
Little Things Make a Big Difference
Prime B550 series adds the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customize your system to create a uniquely personal look.
AUDIO
Combined Onboard Features Deliver Elevated Audio
Intelligent design and premium hardware create audio quality unlike anything you've ever experienced.
- Audio Shielding
Separates analog & digital signal domains, significantly reducing multi-lateral interference - Separate Layer for Left and Right Tracks
Ensures minimal crosstalk between audio paths - Premium Japanese Capacitors
These premium parts provide an immersive sound signature, with exceptional fidelity
Additional Information:
Visit the Manufacturer Product Web Page for Full Details
Port I/O

Compatibility
Operating System Support:
Windows® 11 or 10, 64 bit
AMD® Processor Support:
This ASUS Motherboard supports AMD AM4 Socket AMD Ryzen™ Processors:
- 5000 Series AMD Ryzen™ Processors
- 5000 G-Series AMD Ryzen™ Processors
- 4000 G-Series AMD Ryzen™ Processors
- 3000 Series AMD Ryzen™ Processors
Specifications
Make and Model | ASUS PRIME B550M-A WIFI II mATX Motherboard |
---|---|
Chipset | AMD® B550 |
CPU Support* | 5000 Series AMD Ryzen™ Processors 5000 G-Series AMD Ryzen™ Processors 4000 G-Series AMD Ryzen™ Processors 3000 Series AMD Ryzen™ Processors * Refer to www.asus.com for CPU support list |
Memory | 4x DDR4 DIMM Slots, 128GB Maximum (4x 32GB) Overclocked Speeds*: 4866 / 4800 / 4600 / 4466 / 4400 / 4333 / 4266 / 4200 / 4133 / 4000 / 3866 / 3733 / 3600 / 3466 / 3400 / 3333 MHz Stock Speeds: * Overclock Memory Frequency support varies based on the CPU Refer to www.asus.com for the Memory QVL (Qualified Vendor List). |
Integrated Graphics* | 1 x HDMI 2.1 port (4K @ 60Hz) 1x D-Sub port 1x DVI-D port * Video Ports on this Motherboard's Back Panel only work with Ryzen™ G-Series Processors |
Storage | Supports 2x M.2 slots and 4x SATA 6Gb/s ports All AMD Ryzen™ 5000 Series & 3000 Series Desktop Processors: 1x M.2 slot (Key M) type 2242 / 2260 / 2280 / 22110 (PCIe 4.0 x4 or SATA) 1x M.2 slot (Key M) type 2242 / 2260 / 2280 (PCIe 3.0 x4 or SATA) 4x SATA 6Gb/s ports Supports RAID 0, 1, 10 All AMD Ryzen™ 4000 G-Series Desktop Processors: |
Expansion Slots | AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors: 1x PCIe 4.0 x16 (x16 mode) Slot 2x PCIe 3.0 x1 Slots AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors |
LAN | Realtek Ethernet Chipset: 1x RJ45 Gigabit Ethernet port |
Wireless | Wi-Fi 6 802.11 a/b/g/n/ac/ax Dual Band (2.4 / 5 GHz) w/ 2x2 Antenna Supports up to 2.4Gbps Bandwidth |
Bluetooth | Intel® Wi-Fi 6 Chipset: Bluetooth v5.2 |
USB Ports | Rear Panel USB Ports: 2x USB 3.2 Gen2 (10Gbps) Type-A ports 4x USB 3.2 Gen1 (5Gbps) Type-A ports Front Panel USB Headers*: |
Audio | Realtek 7.1 Surround Sound High Definition Audio CODEC: Supports 7.1 / 5.1 Channel Audio* * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking Up to 24 bit / 192kHz Audio Playback Audio Shielding |
Back Panel I/O Ports | 2x USB 3.2 Gen2 (10Gbps) Type-A ports 4x USB 3.2 Gen1 (5Gbps) Type-A ports 1x D-Sub port 1x RJ45 Gigabit Ethernet port 3x 3.5mm Audio jacks 1x PS/2 Combo Keyboard / Mouse Port |
Internal I/O | 1x 24-pin Main Power connector 1x 8-pin +12V Power connector 1x 4-pin CPU Fan header 1x 4-pin CPU OPT Fan header 2x 4-pin Chassis Fan headers 2x NVMe M.2 PCIE / SATA slots 2x USB 2.0 headers support additional 4 USB 2.0 ports 1x Addressable Gen 2 header 1x Clear CMOS header 1x Front Panel Audio header (AAFP)1x S/PDIF Out header 1x Speaker header 1x 10-1 pin System Panel header 1x SPI TPM header (14-1pin) |
ASUS Special Features | ASUS 5X PROTECTION III - ASUS DIGI+ VRM - ASUS LANGuard - ASUS Overvoltage Protection - ASUS SafeSlot Core - ASUS Stainless-Steel Back I/O ASUS Q-Design - VRM heatsink design AURA Sync |
Software Features | ASUS Exclusive Software Armoury Crate Aura Creator Aura Sync AI Suite 3 AI Charger DAEMON ToolsMy ASUS Norton Anti-virus software (Free Trial for 60 days)WinRAR UEFI BIOSASUS EZ DIY ASUS CrashFree BIOS 3 ASUS EZ Flash 3 ASUS UEFI BIOS EZ Mode |
BIOS | 256 Mb Flash ROM, UEFI AMI BIOS |
Manageability | WOL by PME, PXE |
Operating System | Requires Windows® 11 or 10, 64 bit |
Form Factor | mATX Form Factor: 244 x 244mm |
Package Contents
- ASUS PRIME B550M-A WIFI II mATX Motherboard
- I/O Shield
- 2x SATA III 6Gb/s Cables
- Wi-Fi Moving Antenna
- M.2 Screw Package
- Support DVD
- User Manual