PRIME B650M-A AX II

AMD B650 Micro-ATX motherboard, DDR5, PCIe 5.0 M.2 support, 2.5Gb Ethernet, Wi-Fi 6, DisplayPort, VGA, HDMI^®, SATA 6 Gbps, USB 3.2 Gen 2 ports, front USB 3.2 Gen 1 Type-C^®, BIOS FlashBack^™, Aura Sync

Ready for Advanced AI PC: Designed for the future of AI computing, with the power and connectivity needed for demanding AI applications
AM5 Socket for AMD Ryzen™ Desktop Processors
Ultrafast Connectivity: Wi-Fi 6, M.2 PCIe 5.0, 2.5Gb Ethernet, USB 3.2 Gen 2 ports, front USB 3.2 Gen 1 Type-C^®
ASUS OptiMem II: Careful routing of traces and vias, plus ground layer optimizations to preserve signal integrity for improved memory overclocking
Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2+
Aura Sync RGB Lighting: Onboard Addressable Gen 2 headers and Aura RGB header for RGB LED strips, easily synced with Aura Sync-capable hardware
CEC Tier II ready

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PRIME Series provides users and PC DIY builders a range of performance tuning options via intuitive software and firmware features.

PRIME B650M-A AX II

B650M-A AX II

ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen 7000-series processors. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, PRIME B650M-A AX II provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. This platform delivers the power and connectivity that advanced AI PC applications demand.

Gen 5 Slot for Storage
DDR5 Support
2.5 Gb Ethernet
WiFi 6
Intelligent Control
Customization

All specs of the PRIME Series motherboard

HDMI^®
VGA
DisplayPort
BIOS FlashBack™ button
1 x PS/2
2 x USB 3.2 Gen 1 (Type-A)
4 x USB 2.0 (Type-A)
Realtek 2.5 Gb Ethernet
2 x USB 3.2 Gen 2 (Type-A)
Wi-Fi 6
3 x Audio Jacks
Expansion Slots
• 1 x PCIe 4.0 x16 (supports x16 mode)
SafeSlot Core+
• 3 x PCIe 4.0 x16 (support x1 mode)
1 x Aura RGB Header
3 x Addressable Gen 2 Headers
DDR5 support
• OptiMem II
AM5 Socket for AMD Ryzen™ Desktop Processors
1 x Front USB 3.2 Gen 1 Header
1 x Front USB 3.2 Gen 1 Type-C^®
2 x M.2 slots
• 1 x M.2 2280 (PCIe 5.0 x4 mode)
• 1 x M.2 2280 (PCIe 4.0 x4 mode)
AMD B650 Chipset
8 x SATA 6Gb/s
2 x Front USB 2.0 Headers

FLEXIBILITY

Comprehensive controls form the foundation of the ASUS PRIME series. The PRIME B650 motherboard packs flexible tools to tune every aspect of your system, enabling performance tweaks to perfectly match the way you work to maximize productivity.

Intelligent Control

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.

Overclocking Technologies

Whether you’re looking to crush benchmarks or fine-tune your system for daily driving, PRIME offers unique tools that let you exploit the intricacies of the latest Ryzen architecture.

Dynamic OC Switcher

Dynamic OC Switcher maximizes CPU performance by letting you set current and temperature thresholds to automatically switch between a manual overlock for heavy multithreaded workloads and AMD Precision Boost Overdrive (PBO) for single-threaded tasks.

AI Cooling ll

AI Cooling II balances the thermals and acoustics of any build with a single click. A proprietary ASUS algorithm slashes unnecessary noise while running a quick stress test, and then it monitors CPU temperatures to dynamically adjust fans to optimal speeds.

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.

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 B650 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.

Heatsink & PCB Design

Six-Layer PCB Design

Multiple PCB layers optimize heat management for critical components, providing more headroom to push CPUs beyond stock speeds.

VRM Heatsink and Thermal Pad

VRM heatsink and thermal pads improve heat transfer from the MOSFETs and chokes for better cooling performance.

Prime motherboard with VRM heatsink image

Cooler by Design

Prime B650 series features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.

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

The PRIME B650 series is built to handle the high core counts and bandwidth demands of AMD processors. ASUS B650 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.

Memory

ASUS OptiMem II

Revisions to the motherboard’s trace routing provide the latest processors with unrestricted access to memory bandwidth. ASUS OptiMem II technology carefully maps memory signal pathways across different PCB layers to reduce vias and adds shielding zones that significantly reduce crosstalk.

Benefits of ASUS OptiMem II:

Improved memory stability and compatibility
Allows lower memory latencies at equivalent voltages
Improved memory frequency margin

Motherboards with OptiMem II technology were tested with Synopsys HSPICE simulation software

DDR5 Performance Enhancement

Comprehensive memory tuning options are the cornerstone of PRIME motherboards. With the PRIME B650M-A AX II, you can extract all of the potential out of your DDR5 modules, whether they're from an extreme-speed kit or an entry-level set that would otherwise be locked.

For entry-level modules without EXPO™ memory support, we’ve got you covered. Click here to learn more about AEMP. .

For those who want to fly past stock DDR5 speeds, the PRIME B650M-A AX II is primed and ready for enthusiast-grade kits courtesy of vast AMD Extended Profiles for Overclocking (EXPO™) support. Seasoned veterans can further tweak performance via the extensive array of settings in the UEFI.

Storage

PCIe 5.0 M.2 Support

PRIME B650M-A AX II offers a total of two M.2 slots, the first one supports data-transfer speeds of up to 128Gbps via PCIe 5.0, enabling quicker boot-up and app load times with OS or application drives.

*Actual transmission speeds will be lower than the theoretical maximum speed.

Connectivity

The PRIME motherboard features onboard WIFI 6.

PCIe 4.0 Slot

Prime B650 motherboards offer PCIe 4.0 Slot connectivity for the latest GPUs. The wide bandwidth and superfast transmission speeds allow you to create feature-rich builds that can handle high loads effortlessly.

Realtek 2.5 Gb Ethernet

Realtek 2.5 Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfers.

Lower CPU workload

High TCP and UDP throughput

LANGuard

ASUS LANGuard is a hardware-level network protection feature that integrates advanced signal-coupling technology and premium anti-EMI surface-mounted capacitors to improve throughput and ensure a more reliable connection.

CUSTOMIZATION

The PRIME B650 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

TWO-WAY AI NOISE CANCELATION

This utility leverages a massive deep-learning database to reduce background noise from the microphone and incoming audio, while preserving vocals at the same time. This removes distracting keyboard clatter, mouse clicks and other ambient noises so you can hear and be heard with crystal clarity while gaming or in calls.

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

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^® 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

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 >

Static

Breathing

Strobing

Rainbow

Color Cycle

Starry Night

Music Effect

Smart

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.

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.

DIY Friendly

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

Fast blinking

4 Hz (0.25s)

No VGA Detected

Slow blinking

1/2 Hz (2s)

No Boot Device Detected

Very slow blinking

1/8 Hz (8s)

Installation Completed

Solid light

SafeSlot Core+

SafeSlot Core+ is the ASUS-exclusive PCIe slot fortified with a one-piece stainless-steel brace that shields the slot to protect it from damage. The metal cover is tightly secured to the slot with hooks, and the entire assembly is firmly anchored to the PCB with strengthened solder points to provide a secure foundation for heavyweight graphics cards.

Strengthened solder points around the PCIe and DIMM pins.

Metal inserts keep graphics cards properly aligned during installation.

The metal side-panels feature hooks that firmly clasp the slot body.

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.

PRIME B650M-A AX II

PRIME B650M-A AX II

PRIME B650M-A AX II

B650M-A AX II

Specification

Gallery

HDMI®

VGA

DisplayPort

BIOS FlashBack™ button

1 x PS/2

2 x USB 3.2 Gen 1 (Type-A)

4 x USB 2.0 (Type-A)

Realtek 2.5 Gb Ethernet

2 x USB 3.2 Gen 2 (Type-A)

Wi-Fi 6

3 x Audio Jacks

Expansion Slots • 1 x PCIe 4.0 x16 (supports x16 mode) SafeSlot Core+ • 3 x PCIe 4.0 x16 (support x1 mode)

1 x Aura RGB Header

3 x Addressable Gen 2 Headers

DDR5 support • OptiMem II

AM5 Socket for AMD Ryzen™ Desktop Processors

1 x Front USB 3.2 Gen 1 Header

1 x Front USB 3.2 Gen 1 Type-C®

2 x M.2 slots • 1 x M.2 2280 (PCIe 5.0 x4 mode) • 1 x M.2 2280 (PCIe 4.0 x4 mode)

AMD B650 Chipset

8 x SATA 6Gb/s

2 x Front USB 2.0 Headers

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Comprehensive controls form the foundation of the ASUS PRIME series. The PRIME B650 motherboard packs flexible tools to tune every aspect of your system, enabling performance tweaks to perfectly match the way you work to maximize productivity.

Intelligent Control

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

Flexible Cooling Controls

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.

Overclocking Technologies

Whether you’re looking to crush benchmarks or fine-tune your system for daily driving, PRIME offers unique tools that let you exploit the intricacies of the latest Ryzen architecture.

Dynamic OC Switcher

Ryzen Core Flex

AI Cooling ll

AI Cooling II balances the thermals and acoustics of any build with a single click. A proprietary ASUS algorithm slashes unnecessary noise while running a quick stress test, and then it monitors CPU temperatures to dynamically adjust fans to optimal speeds.

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.

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.

.clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; } COOLING .clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; }

PRIME B650 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.

Heatsink & PCB Design

Six-Layer PCB Design

Multiple PCB layers optimize heat management for critical components, providing more headroom to push CPUs beyond stock speeds.

VRM Heatsink and Thermal Pad

VRM heatsink and thermal pads improve heat transfer from the MOSFETs and chokes for better cooling performance.

Cooler by Design

Prime B650 series features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.

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.

.clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; } PERFORMANCE .clll1, .clll3 { fill: #5e5e5e; } .clll1, .clll2 { opacity: 0.35; }

The PRIME B650 series is built to handle the high core counts and bandwidth demands of AMD processors. ASUS B650 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.

Memory

ASUS OptiMem II

Revisions to the motherboard’s trace routing provide the latest processors with unrestricted access to memory bandwidth. ASUS OptiMem II technology carefully maps memory signal pathways across different PCB layers to reduce vias and adds shielding zones that significantly reduce crosstalk.

Benefits of ASUS OptiMem II:

DDR5 Performance Enhancement

Comprehensive memory tuning options are the cornerstone of PRIME motherboards. With the PRIME B650M-A AX II, you can extract all of the potential out of your DDR5 modules, whether they're from an extreme-speed kit or an entry-level set that would otherwise be locked.

HDMI^®

Expansion Slots
• 1 x PCIe 4.0 x16 (supports x16 mode)
SafeSlot Core+
• 3 x PCIe 4.0 x16 (support x1 mode)

DDR5 support
• OptiMem II

1 x Front USB 3.2 Gen 1 Type-C^®

2 x M.2 slots
• 1 x M.2 2280 (PCIe 5.0 x4 mode)
• 1 x M.2 2280 (PCIe 4.0 x4 mode)

FLEXIBILITY

COOLING

PERFORMANCE

USB 3.2 Gen 2x2 Type-C^®

A batch of USB ports support high-end rigs loaded with peripherals, including a rear USB Type-C^® connector with ultrafast USB 3.2 Gen 2x2 for transmission speeds of up to 20Gbps.

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.

CUSTOMIZATION