ASUS PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard

BH #ASPB550MAWII • MFR #PRIME B550M-A WIFI II
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ASUS PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard
Key Features
  • Micro-ATX Form Factor
  • AMD B550 Chipset
  • AM4 Socket
  • 4 x Dual-Channel DDR4-4866 (OC)
Build a powerful AMD Ryzen system in a compact form factor with the PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard from ASUS. Powered by the AMD B550 chipset, this motherboard supports Ryzen 5000, 4000, and 3000 series processors with the AM4 socket. Designed for power, this micro-ATX motherboard utilizes the PCIe 4.0 data bandwidth to deliver high performance for intensive tasks such as gaming, video editing, and more. Use up to 128GB of dual-channel DDR4 memory, reaching 4866 MHz when overclocked, thanks to four memory slots. Storage wise, this motherboard supports two M.2 slots and four SATA III ports, which can be configured into RAID 0, 10, or 10 configurations. The PCIe 4.0 x16 slot can accommodate a high-end graphics card, while the additional PCIe 3.0 x16 and PCIe 3.0 x1 slots are available for compatible expansion cards.

Utilize your CPU's integrated graphics and connect a monitor directly to the back I/O panel thanks to HDMI, VGA, and DVI-D ports. The Prime B550M-A features integrated Wi-Fi 6 that's capable of reaching up to 2.4 Gb/s with compatible networking devices. You can also take advantage of the Gigabit Ethernet port for a stable wired connection. Peripherals such as keyboards and mice can be connected to the rear panel's USB 2.0 Type-A ports, while external storage devices can be connected the USB 3.2 Gen 2 Type-A ports. Additionally, wireless accessories such as headsets can be connected with Bluetooth 5.2 technology. Windows 11 or Windows 10 64-Bit is required to take advantage of this motherboard's features.
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ASUS B550M-A II WiFi Overview

Build a powerful AMD Ryzen system in a compact form factor with the PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard from ASUS. Powered by the AMD B550 chipset, this motherboard supports Ryzen 5000, 4000, and 3000 series processors with the AM4 socket. Designed for power, this micro-ATX motherboard utilizes the PCIe 4.0 data bandwidth to deliver high performance for intensive tasks such as gaming, video editing, and more. Use up to 128GB of dual-channel DDR4 memory, reaching 4866 MHz when overclocked, thanks to four memory slots. Storage wise, this motherboard supports two M.2 slots and four SATA III ports, which can be configured into RAID 0, 10, or 10 configurations. The PCIe 4.0 x16 slot can accommodate a high-end graphics card, while the additional PCIe 3.0 x16 and PCIe 3.0 x1 slots are available for compatible expansion cards.

Utilize your CPU's integrated graphics and connect a monitor directly to the back I/O panel thanks to HDMI, VGA, and DVI-D ports. The Prime B550M-A features integrated Wi-Fi 6 that's capable of reaching up to 2.4 Gb/s with compatible networking devices. You can also take advantage of the Gigabit Ethernet port for a stable wired connection. Peripherals such as keyboards and mice can be connected to the rear panel's USB 2.0 Type-A ports, while external storage devices can be connected the USB 3.2 Gen 2 Type-A ports. Additionally, wireless accessories such as headsets can be connected with Bluetooth 5.2 technology. Windows 11 or Windows 10 64-Bit is required to take advantage of this motherboard's features.

Prime
ASUS Prime series motherboards are expertly engineered to unleash the full potential of the AMD Ryzen 5000 series. Boasting a robust power design, comprehensive cooling solution, and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features.
Digi+ VRM 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.
All-Around Energy Efficiency
With the Energy Processing Unit (EPU), you'll enjoy system-wide power savings. The EPU automatically optimizes power consumption and maximizes savings with Away mode.
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.
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 motherboards feature comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.
UEFI Bios
The 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
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.
Quick and Simple Setup
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.
Achieve Speed with Onboard M.2
PCIe 4.0 M.2 Slot supports up to 22110 and provides NVMe SSD RAID support for a strong performance boost. Create a RAID configuration with up to two PCIe 4.0 storage devices to enjoy the fastest data-transfer speeds on AMD Ryzen 5000 Series and 3000 Series Processors.
Combined Onboard Features Deliver Elevated Audio
Audio shielding separates analog and digital signal domains, significantly reducing multi-lateral interface, while a separate layer for left and right tracks ensures minimal crosstalk between audio paths. Additionally, premium audio capacitors provide an immersive sound signature, with exceptional fidelity.
SafeSlot Core
SafeSlot core is the ASUS-exclusive PCIe slot. Featuring a fortified design that's anchored to the motherboard by a special hook, SafeSlot Core provides 1.6x stronger retention and 1.3x greater shearing resistance than standard expansion slots.
Aura Sync
A well-tuned enthusiast system deserves a matching aesthetic. ASUS Aura offers full RGB lighting control with a variety of functional presets for RGB LED strips connected to the onboard RGB headers, and it can all be synced with an ever-growing portfolio of Aura-capable hardware.
Addressable Gen 2 Header
The addressable Gen 2 header is now capable of detecting the number of LEDs on second-gen addressable RGB devices, allowing the software to automatically tailor lighting effects to specific devices. The new header also offers backward-compatibility with existing Aura RGB gear.
Armoury Crate
Armoury Crate is a software utility designed to give you centralized control of supported products. From a single intuitive interface, Armoury Crate allows you to easily customize RGB lighting and effects for every compatible device in your arsenal. The software also provides control of settings for ASUS products, including keyboard and mouse preferences. Armoury Crate even features dedicated product registration and highlights to help you stay in touch with the ASUS community.
UPC: 195553309752

ASUS B550M-A II WiFi Specs

Key Specs
Chipset
AMD B550
CPU Socket
AM4
Memory Slots
4x 288-Pin
Memory Type Support
DDR4, 4866 MT/s Maximum Supported Speed
M.2 Slots
22110
Expansion Slots
1x PCIe 4.0 x16
1x PCIe 3.0 x16
2x PCIe 3.0 x1
Wi-Fi
Wi-Fi 6 (802.11ax)
Form Factor
Micro-ATX
CPU
Chipset
AMD B550
CPU Socket
AM4
Back Panel I/O
USB
2x USB-A (USB 3.1/3.2 Gen 2)
4x USB-A (USB 3.0 / 3.1/3.2 Gen 1)
Thunderbolt
No
Display
1x HDMI
1x DVI-D
1x VGA
Audio
3x 1/8" / 3.5 mm
Ethernet / Controller
1x Gigabit
PS/2
1x Combo
Buttons
BIOS Flashback, Clear CMOS
Memory
Memory Slots
4x 288-Pin
Memory Type Support
DDR4, 4866 MT/s Maximum Supported Speed
Maximum Capacity
128 GB
Channel Architecture
Dual Channel
Storage Expansion
SATA
4x SATA III
M.2 Slots
2x M.2 (M Key) 22110/2280/2260/2242 (PCIe 4.0 x4)
Optane Memory Support
No
RAID Support
RAID 0, 1, 10
Internal I/O
Expansion Slots
1x PCIe 4.0 x16
1x PCIe 3.0 x16
2x PCIe 3.0 x1
USB
1x USB 3.0 / 3.1/3.2 Gen 1 Header (Supports 2 USB-A Port)
2x USB 2.0 Header (Supports 4 USB-A Port)
Air Cooling
2x 4-Pin CPU
Power Connectors
1x 24-Pin Mainboard
1x 8-Pin ATX
Security
TPM Header
LED Header
2x RGB
Audio
1x S/PDIF
1x Speaker
Diagnostics
Clear CMOS, Flash BIOS
BIOS
ROM
256 Mb
Front Panel I/O
Front Panel I/O
AAFP, USB 3.0 / 3.1/3.2 Gen 1
Audio
Audio Codec
Realtek (7.1-Channel)
Wireless
Wi-Fi
Wi-Fi 6 (802.11ax)
Bluetooth
Bluetooth 5.2
Software
OS Compatibility
Windows 10 to 11 (64-Bit Only)
Physical
Form Factor
Micro-ATX
Dimensions
9.6 x 9.6" / 24.4 x 24.4 cm
Packaging Info
Package Weight
2.53 lb
Box Dimensions (LxWxH)
11.3 x 11.1 x 2.7"

ASUS B550M-A II WiFi Reviews

Great motherboard for gaming builds

By Anonymous
Rated 5 out of 5
Date: 2026-04-20

The ASUS PRIME B550M-A WiFi II is a really good motherboard for the price. It was easy to install and works perfectly with my Ryzen 5 processor. The built-in WiFi is a big plus and saves you from needing extra adapters. BIOS is user-friendly and has good options like PBO and Resizable BAR for better performance. It runs stable, supports fast RAM, and has enough ports for most setups. Overall, it’s a great choice for gaming or a mid-range PC build.

Chassis fans

By Lanaaa
Rated 4 out of 5
Date: 2026-02-26

Everything is perfect! Its just that I wish the Chassis fan pins were at the top for a cleaner fan look!

See any errors on this page?

Does it support argb

Does it support argb
Asked by: basem
The ASUS PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard BH #ASPB550MAWII has ASUS Aura for full RGB control.
Answered by: Reuben K
Date published: 2023-12-08

Does it need a bios update for ryzen 5 5600x

Does it need a bios update for ryzen 5 5600x
Asked by: basem
No, the ASUS PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard does not need a BIOS update to support the Ryzen 5 5600X.
Answered by: Kenneth C
Date published: 2023-12-07

Does it have flashback bios

Does it have flashback bios
Asked by: basem
The ASUS PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard, (B&H # ASPB550MAWII), does not have BIOS Flashback. It supports Asus EZ Flash 3 which requires a working CPU.
Answered by: Miguel M
Date published: 2023-12-08

need bios update for amd ryzen 5 5000g ?

need bios update for amd ryzen 5 5000g ?
Asked by: free fire
No, the ASUS PRIME B550M-A WIFI II Micro-ATX DDR4 Motherboard does not need a BIOS update to be compatible with the Ryzen 5 5700G.
Answered by: Alex D
Date published: 2023-11-07
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