PRIME B650M-A-CSM

AMD B650 Micro-ATX motherboard with DDR5, PCIe 5.0 M.2, 2.5Gb Ethernet, DisplayPort/HDMI®/VGA, rear USB 3.2 Gen 2, front USB 3.2 Gen 1 Type-C®, BIOS FlashBack™, Arua Sync
  • AMD AM5 Socket: Ready for AMD Ryzen™ 7000 Series Desktop Processors
  • Ultrafast Connectivity: M.2 PCIe 5.0, Realtek 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
  • ASUS Control Center Express (ACCE) for easier IT endpoint management
Ready For Advanced AI PC
PRIME B650M-A-CSM
PRIME B650M-A-CSM motherboard, 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 B650M-A

B650M-A-CSM



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-CSM provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features.


icon-AMD
  • Gen 5 Slot for Storage

    Gen 5 Slot for Storage

  • DDR5 Support

    DDR5 Support

  • Front USB Type-C®

    Front USB Type-C®

  • 2.5 Gb Ethernet

    2.5 Gb Ethernet

  • Intelligent Control

    Intelligent Control

  • Customization

    Customization

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All specs of the Prime series motherboar All specs of the Prime series motherboar
  • 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)
  • 3 x Audio Jacks
  • Expansion Slots
    • 1 x PCIe 4.0 x16 (max @x16 mode)
     SafeSlot Core+
    • 2 x PCIe 4.0 x16 (@x1 mode)
  • 1 x Aura RGB Header
  • 3 x Addressable Gen 2 Headers
  • DDR5 support
    • OptiMem II
  • AM5 Socket for AMD Ryzen™ 7000 Series 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
  • 4 x SATA 6Gb/s
  • 2 x Front USB 2.0 Headers

ASUS Corporate Stable Model



ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards. Offering up to 36-month product lifecycle support and 6-month end-of-life notice to allow sufficient lead times for your organization to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express - server-grade IT management software.


* Lifecycle support, program offering and supply status may vary by region. Please consult your local sales representative for more information.


Learn more about ASUS CSM program
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ASUS Control
Center Express

ASUS Control Center Express is an integrated IT monitoring and management software designed to deploy faster, simplify IT operations and improve productivity with comprehensive control and user-friendly functions. ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality, TCO-optimized solution for your business needs.


Learn more about ASUS Control Center Express
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Optimize IT endpoint management


Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely


Automate IT maintenance


Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility


Securely manage all of endpoints


Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices

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.
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Intelligent Control


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PBO Enhancement UI setting. UI of Power Saving settings 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

The Power Saving function contains several settings can easily optimize power consumption and maximize energy savings. You can enable a CPU power limit, darken Aura lighting, and set the fan profile to a power saving mode. You can also toggle the Power Saver plan that is built into Microsoft Windows.

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 B650 series are engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.

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 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.

Six-Layer PCB Design



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

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

Prime series motherboar supports ASUS OptiMem II.

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

Prime series motherboar supports DDR5.

DDR5 Performance Enhancement


Comprehensive memory tuning options are the cornerstone of PRIME motherboards. With the PRIME B650M-A-CSM, 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. arrow .

For those who want to fly past stock DDR5 speeds, the PRIME B650M-A-CSM 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.
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Storage



PCIe 5.0 M.2 Support



PRIME B650M-A 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.

supports PCIe 5.0 M.2 Support.

Connectivity

supports PCIe® 4.0 Slot.
The PRIME B650M-A motherboard features USB 3.2 Gen 2 Type-C®
features Front USB Port.
The PRIME B650M-A motherboard features Thunderbolt™ USB4 header.
The PRIME B650M-A 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.

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 B650M-A motherboard features WIFI 6

*Actual speed varies and depends on networking conditions.

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
The PRIME B650M-A motherboard features Realtek 2.5 Gb Ethernet and LanGuard.

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.
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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

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

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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.

RGB decoration line

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

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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
The PRIME B650M-A motherboard features Q-LED Core. The PRIME B650M-A 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
The PRIME B650M-A motherboard features BIOS FlashBack™.
features SafeSlot Core+. features SafeSlot Core+.

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.

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.
SafeSlot Core+ image

Strengthened solder points around the PCIe and DIMM pins.

SafeSlot Core+ image

Metal inserts keep graphics cards properly aligned during installation.

SafeSlot Core+ image

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

SafeSlot Core+ image
Overvoltage Protection
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
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 B650 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.
Ryzen 7000 Series Ryzen 7000 Series

THIS CHANGES EVERYTHING.

FROM THIS NEW PLATFORM, YOU CAN SEE THE FUTURE

Build your next rig with an AMD Ryzen™ 7000 Series processor and PRIME B650M-A-CSM to experience advanced performance. With up to 16 “Zen 4” cores and 32 threads, boost clocks of up to 5.7GHz, and 80MB cache, the AMD Ryzen™ 7000 Series keeps you ahead of the game.1

You’ll also gain access to new features for gamers with AMD Socket AM5, from the speed of DDR5 memory to the increased bandwidth of PCIe® 5.0. AMD Ryzen™ 7000 Series processors and AMD socket AM5 motherboards are unlocked for overclocking to personalize your experience. Gain even more performance when you overclock your DDR5 memory with AMD EXPO™ technology.2

  1. Max boost for AMD Ryzen processors is the maximum frequency achievable by a single core on the processor running a bursty single-threaded workload. Max boost will vary based on several factors, including, but not limited to: thermal paste; system cooling; motherboard design and BIOS; the latest AMD chipset driver; and the latest OS updates. GD-150
  2. Overclocking and/or undervolting AMD processors and memory, including without limitation, altering clock frequencies / multipliers or memory timing / voltage, to operate outside of AMD’s published specifications will void any applicable AMD product warranty, even when enabled via AMD hardware and/or software. This may also void warranties offered by the system manufacturer or retailer. Users assume all risks and liabilities that may arise out of overclocking and/or undervolting AMD processors, including, without limitation, failure of or damage to hardware, reduced system performance and/or data loss, corruption or vulnerability. GD-106
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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