PLEASE NOTE:

For 3rd & 5th gen Ryzen CPUs only

Not compatible with Ryzen 5 3400G & Ryzen 3 3200G

AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, 1 Gb Ethernet, HDMI/D-Sub/DVI, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB headers support

AMD AM4 socket: Ready for 3rd Gen AMD Ryzen™ Processors

Comprehensive cooling: VRM heatsink, PCH heatsink, and Fan Xpert 2+

Ultrafast connectivity: Dual M.2, PCIe 4.0, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A

Aura Sync RGB: Onboard addressable Gen 2 header for RGB LED strips, easily synced with Aura Sync-capable hardware

Prime

ASUS Prime series is expertly engineered to unleash the full potential of 3rd Generation 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.

Cooler by Design

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.

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.

VRM Heatsink and Thermal Pads

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

PCIe 4.0 M.2 (up to 64 Gbps)

Achieve speed with onboard M.2

PCIe 4.0 M.2 Slot supports up to 22110 and provide 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 Generation AMD Ryzen platform.

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 interface that let you customize your system to create a uniquely personal look.

Outstanding 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

Premium parts provide an immersive sound signature, with exception

Motherboard Type
Desktop

Form Factor
Micro ATX

Socket
AMD AM4

Chipset
AMD B550

RAM Technology
DDR4 (Dual Channel)

RAM Slots
4 x DIMM

RAM Speeds
3rd Gen AMD Ryzen CPUs:
4600(O.C)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz

Next Gen AMD Ryzen PRO CPUs:
4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz

Maximum Memory
128GB

Graphics
Integrated Graphics Processor*

Graphics specifications may vary between CPU types

Graphics Ports
1 x VGA
1 x DVI-D
1 x HDMI

Multi-GPU Support
-

PCI/PCI Express
1 x PCIe 4.0 x16 (x16 mode)
2 x PCIe 3.0 x1

Storage
4 x SATA III
1 x M.2 (2242/2260/2280/22110) - SATA & PCIe
1 x M.2 (2242/2260/2280) - SATA & PCIe

RAID
RAID 0, 1, 10

Wireless
-

LAN
GB LAN

Audio
Realtek ALC887 7.1 Surround Sound High Definition Audio CODEC

USB Ports Supported
2 x USB 3.2 Gen2 Type-A (at back)
6 x USB 3.2 Gen1 (4 at back, 2 at mid-board)
4 x USB 2.0 (at mid-board)

Back Panel I/O Ports
1 x PS/2 keyboard/mouse
1 x DVI-D
1 x D-Sub
1 x HDMI
1 x LAN (RJ45)
2 x USB 3.2 Gen2 Type-A
4 x USB 3.2 Gen 1 Type-A
3 x Audio jacks

Internal I/O Connectors
1 x CPU Fan
1 x CPU OPT Fan
2 x Chassis Fan
2 x Aura RGB Strip
1 x Addressable Gen2
1 x USB 3.2 Gen1
2 x USB 2.0
2 x M.2 Socket 3 with M key
1 x SPI TPM
4 x SATA 6Gb/s
1 x S/PDIF out
1 x 24-pin EATX

1 x 8-pin EATX 12V
1 x Front audio
1 x Clear CMOS jumper
1 x System panel
1 x COM port
1 x Speaker

Accessories
I/O Shield
2 x SATA 6Gb/s cables
1 x Supporting DVD
User manual
1 x M.2 SSD screw package