ASUS MB PRIME B550M-A WIFI II AMD B550 AM4 Max.128GB DDR4 mATX Motherboard

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.
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.

Processor & Chipset

Chipset Manufacturer:   AMD
Total Processor Supported:   1
Processor Socket:   Socket AM4
Processor Supported:   Ryzen 3
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:   2666 MHz
Memory Speed Supported:   2800 MHz
Memory Speed Supported:   3000 MHz
Memory Speed Supported:   3200 MHz
Memory Speed Supported:   3466 MHz (O.C.)
Memory Speed Supported:   3600 MHz (O.C.)
Memory Speed Supported:   3866 MHz (O.C.)
Memory Speed Supported:   4000 MHz (O.C.)
Memory Speed Supported:   4133 MHz (O.C.)
Memory Speed Supported:   4400 MHz (O.C.)
Memory Speed Supported:   4600 MHz (O.C.)
Memory Speed Supported:   4800 MHz (O.C.)
Memory Speed Supported:   4866 MHz (O.C.)

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
4K: Supports 4K at 60Hz as specified in HDMI 2.1

Audio

Audio Channels:   Realtek 7.1 Surround High Definition

Network & Communication

Wireless LAN:   Wi-Fi 6 802.11 a/b/g/n/ac/ax
2.5 Gigabit Ethernet:   Yes
Bluetooth: Bluetooth 5.2

I/O Expansions

Number of Total Expansion Slots:   4
Total Number of PCI Express Slots:   4
Number of PCI Express 3.0 x1 Slots:   2
Number of PCI Express 4.0 x16 Slots:   1
Number of PCI Express 3.0 x16 Slots:   1

Interfaces/Ports

Number of USB 2.0 Headers:   2 (Support additiona 4 USB 2.0 ports)
Total Number of USB Ports:   6
Number of USB 3.2 Gen 2 Ports:   2 (2 x Type-A)
Number of USB 3.2 Gen 1 Ports:   4 (4 x Type-A)
Audio Jacks:   3
BIOS EZ Flash: Yes
PS/2 Combo Port: Yes
S/PDIF:   Yes
HDMI:   Yes
D-Sub: Yes
DVI-D: Yes
DisplayPort:   No
Number of Network (RJ-45) Ports:   1
Wifi Module: Yes

Onboard Interfaces

Number of SATA Interfaces:   4
Number of M.2 Interfaces:   2 (Key M)
Total Number of Onboard USB Ports:   3
Number of Onboard USB 3.2 Ports:   1 x header supports additional 2 USB 3.2 Gen 1
Number of Onboard USB 2.0 Ports:   2 x headers support additional 4 USB 2.0 ports

Special Features
ASUS 5X PROTECTION III
- DIGI+ VRM
- LANGuard
- Overvoltage Protection
- SafeSlot Core
- Stainless-Steel Back I/O
ASUS Q-Design
- Q-DIMM
- Q-Slot
ASUS Thermal Solution
- VRM heatsink design
AURA Sync
- AURA RGB headers
- Addressable Gen 2 header

Physical Characteristics

Form Factor:   Micro ATX
LED Lighting:    RGB
Width:   9.6"
Depth:   9.6"