Introduction

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 B550M-K is engineered with an array of hybrid fan headers and features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS, ensuring 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.

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.

Processor

Processor manufacturer

AMD

Processor socket

Socket AM4

Compatible processor series

3rd Generation AMD RyzenT 3, 3rd Generation AMD Ryzen 5, 3rd Generation AMD RyzenT 7, 3rd Generation AMD RyzenT 9

Memory

Supported memory types

DDR4-SDRAM

Number of memory slots

4

Memory slots type

DIMM

Supported memory clock speeds

2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4000,4133,4266,4400,4600 MHz

Maximum internal memory

128 GB

Storage controllers

Supported storage drive interfaces

M.2,SATA

Internal I/O

USB 2.0 connectors

2

USB 3.2 Gen 1 (3.1 Gen 1) connectors

1

ATX Power connector (24-pin)

Y

Rear panel I/O ports

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity

4

USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity

2

Ethernet LAN (RJ-45) ports

1

PS/2 ports quantity

1

HDMI ports quantity

1

DVI-D ports quantity

1

Network

Ethernet LAN

Y

LAN controller

Realtek RTL8111H

Wi-Fi

N

Features

Motherboard chipset

AMD B550

Motherboard form factor

micro ATX

Motherboard chipset family

AMD

Windows operating systems supported

Windows 10

Expansion slots

PCI Express x1 (Gen 3.x) slots

2

PCI Express x16 (Gen 4.x) slots

1

Number of M.2 (M) slots

2

BIOS

BIOS type

UEFI AMI

BIOS memory size

256 Mbit