Asus Prime B550M-A WIFI II Desktop Motherboard – AMD B550 Chipset – Socket AM4 – Micro ATX

General Information

Manufacturer:   ASUS Computer International
Manufacturer Part Number:   PRIME B550M-A WIFI II
Manufacturer Website Address:   usa.asus.com
Brand Name:   Asus
Product Line:   Prime
Product Model:   B550M-A WIFI II
Product Name:   Prime B550M-A WIFI II Desktop Motherboard
Marketing Information:AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, HDMI, DVI-D, D-Sub, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB lighting support

• AMD AM4 Socket: Ready for Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors
• 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

PRIME
ASUS Prime series is expertly engineered to unleash the full potential of 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions 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.

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.

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.

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.

VRM Heatsink and Thermal Pads

A VRM heatsink with underneath thermal pad improves heat transfer from the MOSFETs and chokes for better cooling performance.

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.

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.

Outstanding AudioCombined 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.

Product Type:   Desktop Motherboard

Processor & Chipset

Chipset Manufacturer:   AMD
Chipset Model:   B550
Total Processor Supported:   1
Processor Socket:   Socket AM4
Processor Supported:   Ryzen 3
Processor Supported:   Ryzen 3 PRO
Processor Supported:   Ryzen 5
Processor Supported:   Ryzen 5 Pro
Processor Supported:   Ryzen 7
Processor Supported:   Ryzen 7 PRO
Processor Supported:   Ryzen 9
Processor Supported:   Ryzen 9 PRO

Memory

Number of Memory Slots:   4
Memory Form Factor:   DIMM
Memory Form Factor:   UDIMM
Maximum Memory Supported:   128 GB
Memory Technology:   DDR4 SDRAM
Memory Speed Supported:   2133 MHz
Memory Speed Supported:   2400 MHz
Memory Speed Supported:   2667 MHz
Memory Speed Supported:   2800 MHz
Memory Speed Supported:   3000 MHz
Memory Speed Supported:   3200 MHz
Memory Speed Supported:   3333 MHz
Memory Speed Supported:   3466 MHz
Memory Speed Supported:   3600 MHz
Memory Speed Supported:   3733 MHz
Memory Speed Supported:   3866 MHz
Memory Speed Supported:   4000 MHz
Memory Speed Supported:   4133 MHz
Memory Speed Supported:   4266 MHz
Memory Speed Supported:   4333 MHz
Memory Speed Supported:   4400 MHz
Memory Speed Supported:   4466 MHz
Memory Speed Supported:   4600 MHz
Memory Speed Supported:   4800 MHz
Memory Speed Supported:   4866 MHz

I/O Controller

Controller Type:   Serial ATA/600
RAID Supported:   Yes
RAID Levels:   0
RAID Levels:   1
RAID Levels:   10

Video

Onboard Video:   CPU Dependent Video

Audio

Audio Channels:   7.1

Network & Communication

Bluetooth:   Yes
Gigabit Ethernet:   Yes
Wireless LAN:   Yes
Wireless LAN Standard:   IEEE 802.11 a/b/g/n/ac/ax

I/O Expansions

Number of Total Expansion Slots:   3
Total Number of PCI Express Slots:   3
Number of PCI Express x1 Slots:   2
Number of PCI Express x16 Slots:   1

Interfaces/Ports

Total Number of USB Ports:   6
Number of USB 3.2 Ports:   6
VGA:   Yes
HDMI:   Yes
DVI:   Yes
Number of Network (RJ-45) Ports:   1

Onboard Interfaces

Number of SATA Interfaces:   4
Number of M.2 Interfaces:   2
Total Number of Onboard USB Ports:   6
Number of Onboard USB 2.0 Ports:   4
Number of Onboard USB 3.2 Ports:   2
Onboard S/PDIF Header:   Yes

Physical Characteristics

Form Factor:   Micro ATX
Width:   9.6″
Depth:   9.6″

Miscellaneous

Brand Compatibility:   AMD