AMD B550 (Ryzen™ AM4) mATX motherboard with dual M.2 slots, PCIe 4.0, Realtek 1Gb Ethernet, DisplayPort/HDMI™, SATA 6 Gbps, rear USB 3.2 Gen 1 ports, front USB 3.2 Gen 1 Type-C® and Aura Sync
  • AMD AM4 Socket: Ready for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors
  • Ultrafast Connectivity: PCIe 4.0, dual M.2 slots, Realtek 1Gb Ethernet, rear USB 3.2 Gen 1 ports and front USB 3.2 Gen 1 Type-C®
  • Comprehensive Cooling: PCH heatsink, hybrid fan headers and Fan Xpert 2+
  • Aura Sync RGB Lighting: Onboard Addressable Gen 2 headers for RGB LED strips, easily synced with Aura Sync-capable hardware
Win11
Ready For Advanced AI PC
PRIME B550M-K ARGB
PRIME B550M-K ARGB front view
kv_background_light kv_background_light kv_background_dark Prime series motherboard provides users and PC DIY builders a range of performance tuning options via intuitive software and firmware features.

PRIME B550M-K ARGB

B550M-K ARGB



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.


icon-AMD
All specs of the Prime series motherboar All specs of the Prime series motherboar
  • 2 x USB 2.0
  • PS/2
  • DP
  • HDMI™
  • 4 x USB 3.2 Gen 1
  • Realtek 1Gb Ethernet
  • 3 x Audio Jacks
  • PCIe 4.0/3.0 x16
    • ASUS SafeSlot Core
  • Audio Features
    • Audio Shielding
    • Premium audio capacitors
    • Dedicated audio PCB layers
  • 2 x DDR4
  • 3 x Addressable Gen 2 headers
  • AMD AM4 Socket
  • 2 x Front USB 3.2 Gen 1 Type-A
  • 1 x Front USB 3.2 Gen 1 Type-C®
  • 64Gb/s M.2
    PCIe 4.0 x4 & SATA modes
  • AMD B550 Chipset
  • 32Gb/s M.2
    PCIe 3.0 x4 & SATA modes
  • 4 x SATA 6Gb/s
  • 4 x Front USB 2.0

FLEXIBILITY



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 performance tweaks to perfectly match the way you work to maximize productivity.
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Intelligent Control


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EPU UI of FAN Xpert 2+ for cooling controls Digi+ VRM feature icon

CPU Performance Boost

AMD Precision Boost Overdrive(PBO) pushes the CPU current and voltage budget to opportunistically increase performance. By aggressively tuning the PBO parameters, AMD‘s algorithm can leverage the motherboard’s robust power solution to ramp up performance even higher.

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

ASUS Fan Xpert 2+ software provides comprehensive control over fans. An 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.

Precise Digital Power 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.

UEFI BIOS



The renowned 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.
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Advanced Tuning for Serious Tweakers



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.

Search Function


Quickly and easily find the option or setting you need.

ASUS User Profile


Port configuration settings between different BIOS versions or share them with friends.

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.

Intuitive Graphical Fan Control


Fine-tune individual fan settings simply by dragging a curve with the mouse.

Aura On/Off Mode (Stealth)


Easily enable or disable Aura RGB lighting or every onboard LED, for a subdued aesthetic touch.

COOLING


PRIME B550 series are engineered with an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.

Cooler by Design



PRIME B550 series feature comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.
Prime motherboard Prime motherboard with multiple temperature sources image Prime motherboard with AIO Pump Prime motherboard with smart protection image Prime motherboard with 4-Pin PWM/DC Fan image

Multiple Temperature Sources



Each header can dynamically reference three thermal sensors. Fan Xpert 2+ allows you to map the temperature of supported ASUS graphics cards to optimize cooling for GPU- and CPU-intensive tasks.

Smart Protection



A dedicated integrated circuit protects each fan header from overheating and overcurrent.

4-Pin PWM/DC Fan



Each onboard header supports auto-detection of PWM or DC fans.

PERFORMANCE



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 data transfer options.
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Storage



Dual M.2 Slots (up to 64 Gbps)



PRIME B550M-K ARGB offers a total of two M.2 slots, one of which supports data-transfer speeds of up to 64Gbps* via PCIe 4.0, enabling quicker boot-up and app load times with OS or application drives.


* Actual transmission speeds will be lower than the theoretical maximum speed.
* Only AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors support PCIe 4.0 mode.

supports PCIe 4.0 M.2 Support.

Connectivity

supports PCIe 4.0 Slot.
The PRIME B550M-K ARGB motherboard features USB 3.2 Gen 2 Type-C®
features Front USB Port.
The PRIME B550M-K ARGB motherboard features Thunderbolt™ USB4 header.
The PRIME B550M-K ARGB motherboard features onboard WIFI 6.

PCIe 4.0 Slot

PRIME B550M-K ARGB offers PCIe 4.0 slot connectivity for the GPUs. The wide bandwidth and superfast transmission speeds allow you to create feature-rich builds that can handle high loads effortlessly.

* Only AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors support PCIe 4.0 mode.

Front USB Type-C®

A full complement of USB ports support high-end rigs loaded with peripherals, including a front-panel USB 3.2 Gen 1 Type-C® connector that provides data transfer speeds of up to 5Gbps.

WiFi 6

The WiFi 6 module is compatible with the 802.11ax standard and pushes theoretical peak bandwidth up to an incredible 1.2Gbps. Perhaps more importantly for power users, it's optimized for more efficient operation on crowded networks with a lot of competing traffic. Pair your motherboard with ASUS WiFi 6 routers to fully experience the networking potential of WiFi 6.

Learn More

The PRIME B550M-K ARGB motherboard features WIFI 6

*Actual speed varies and depends on networking conditions.

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CUSTOMIZATION



The 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 Audio

500M

Deep-learning database

Audio

Input/output

High

Fidelity

Minimal

Performance Impact

Hear the Difference

Background noise

Other human voice

Human speech

Realtek Codec and Unique Design Features for Pristine, Powerful Audio

logo s1220a
The unique S1220A audio codec designed in close collaboration with Realtek provides pristine audio quality via an unprecedented 120 dB signal-to-noise (SNR) ratio for the stereo line out and a 113 dB SNR for the line in. An impedance-sensing circuit also adjusts gain for optimal headphone volume.
DTS:X logo
DTS:X® Ultra adds a spatial audio feature to boost headphones and speakers for enhanced gaming, VR and extended-reality experiences. DTS:X Ultra supports sound based on channels, scenes, and objects to allow for deeper sonic immersion in enabled content. It also provides post-processing enhancements and device-level tuning for DTS® codecs.

Combined onboard features deliver elevated audio


Intelligent design and premium hardware create audio quality unlike anything you’ve ever experienced.

Audio Shielding


Audio shielding ensures precision analog/digital separation and greatly reduced multi-lateral interference.

Dedicated Audio PCB Layers


Separate layers for left and right tracks ensures both channels deliver consistent, equal quality.

Premium Audio Capacitors


Provides warm, natural, and immersive sound with exceptional clarity and fidelity.

Personalization

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Aura Sync


Outshine the Competition

A well-tuned enthusiast system deserves a matching aesthetic. ASUS Aura offers full RGB lighting control with a variety of functional presets for the built-in RGB LEDs as well as strips and devices connected to the onboard RGB headers — and it can all be synced with an ever-growing portfolio of Aura-capable hardware.

Learn More
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Static

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Breathing

strobing icon

Strobing

rainbow icon

Rainbow

cycle icon

Color Cycle

starry icon

Starry Night

Music Effect icon

Music Effect

Smart icon

Smart

features Aura Sync.
features addressable Gen 2 headers.

Addressable Gen 2 Headers


Three addressable Gen 2 headers are 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 headers also offer backward-compatibility with existing Aura RGB gear.

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Armoury Crate


Within a single intuitive interface, Armoury Crate offers easily customized Aura Sync RGB settings for every compatible device in your arsenal , plus controls for an ever-growing family of ASUS products, including keyboard and mouse preferences. Armoury Crate also integrates product registration and a news feed so that you never miss updates of interest to the ASUS community.
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DIY Friendly

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Q-LED Core


The Q-LED Core display produces light patterns by power LED during the Power-On Self-Test (POST) that can help users troubleshoot potential issues.
No CPU Detected
This motherboard motherboard features Q-LED Core. This motherboard motherboard features Q-LED Core.
Fast blinking

4 Hz (0.25s)

No VGA Detected
q_led q_led2
Slow blinking

1/2 Hz (2s)

No Boot Device Detected
q_led q_led2
Very slow blinking

1/8 Hz (8s)

Installation Completed
q_led q_led2
Solid light
This motherboard features BIOS FlashBack™.

PCIe® Slot Q-Release


A physical button located on the chipset heatsink unlocks the first PCIe slot’s security latch with one press, greatly simplifying the process of detaching a PCIe card from the motherboard when it’s time to upgrade to a new GPU or other compatible device.

BIOS FlashBack™


BIOS FlashBack™ is the simplest and safest (UEFI) BIOS update method. Simply drop the (UEFI) BIOS file onto a FAT32 formatted USB stick, plug it into the USB BIOS FlashBack™ port and press the button. Updates can even be performed without a memory or a CPU installed.

Q-Latch


The innovative Q-Latch makes it easy to install or remove an M.2 SSD without the need for specific tools. The design employs a simple locking mechanism to secure the drive and neatly eliminate traditional screws.

SafeSlot Core+


PCIe 4.0 is 2x faster than PCIe 3.0, so we adapted our SMT manufacturing process for the faster SafeSlot Core+, to ensure the highest data speeds. SafeSlot Core+ is a reinforced metal sheath added to a PCIe slot to keep a card firmly installed.

FlexKey


The Chassis Reset Button – Reassigned

FlexKey is a front-panel header that lets you customize the reset button on the front panel of your chassis to provide quick access to Aura lighting controls, DirectKey or system reset.
  • Features SafeSlot Core image
  • Features SafeSlot Core image

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.
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Overvoltage Protection

World-class circuit-protecting power design
An exclusive circuit design with built-in voltage regulators to protect your motherboard from damage caused by unexpected high-level voltages from unstable or inferior power supplies.
Stainless-Steel Back I/O icon
Stainless-Steel Back I/O

3X corrosion-resistance for greater durability
Corrosion-resistant stainless-steel back I/O panels bonded with chromium oxide have a lifespan that's three times longer than ordinary panels.
Learn more

1000+
Compatible devices and components


The PRIME B550 series provides superior compatibility with thousands of components and our memory support list identifies memory compatibility, giving you more choices for worry-free PC-building experiences.

8000+
Validation hours


Every ASUS motherboard is subjected to more than 8,000 hours of stringent tests, including burn-in, environmental, compatibility, software and safety tests to confirm their durability. ASUS reliability surpasses industry standards, ensuring that every component is designed to function flawlessly in any environment.
Temperature and humidity tests
Temperature and humidity tests
Ensures components withstand extreme conditions.
Thermal measurement tests
Thermal measurement tests
Ensures that the system remains cool and stable under the heaviest loads.
Insertion tests
Insertion tests
Every port and connector is put through repeated installation cycles.
Aging tests
Aging tests
Up to 48-hour aging test ensures reliability.
Power-consumption tests
Power-consumption tests
Checked for world-class energy efficiency.
Temperature and DC margin tests
Temperature and DC margin tests
Ensures that the motherboard is capable of coping with voltages fluctuations caused by varying temperatures.
Thermal-shock tests
Thermal-shock tests
Ensures ability to survive temperature changes during transportation.
Non-operation shock tests
Non-operation shock tests
Built to withstand jolts that may occur during shipping.
Burn-in tests
Burn-in tests
Every component is checked to ensure flawless operation.
Installation tests
Installation tests
Connector placement is double-checked to ensure hassle-free installation.
Drop tests
Drop tests
Drop tests from various heights ensure durability.
Salt and spray tests
Salt and spray tests
Tested for I/O reliability, prolonged lifespan and rust-resistance.
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ASUS Enhanced Memory Profile UI setting

Exclusive AEMP


ASUS Enhanced Memory Profile (AEMP) is an exclusive firmware feature for PMIC-restricted memory modules. AEMP automatically detects the memory chips on your kit and then presents optimized frequency, timing and voltage profiles that you can effortlessly apply to unleash performance.
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