PRIME B350M-A/CSM

    PRIME B350M-A/CSM

    AMD AM4 uATX motherboard with LED lighting, DDR4, 32Gb/s M.2, HDMI, SATA 6Gb/s, USB 3.1

    • 5X Protection III: Multiple hardware safeguards for all-round protection
    • LED illumination: Lighting control for both PCIe slot and audio trace paths
    • Native M.2: Lightning-fast storage speeds
    • Onboard USB 3.1: Latest connectivity for ultrafast 10Gbps transfers
    • One-stop controls: Media-acclaimed UEFI BIOS with EZ Flash 3
      Product Image
      1 VGA Port
      2 DVI-D Port
      3 HDMI
      4 USB 3.0 Ports
      5 USB 3.1 Ports
      6 LAN
      7 Audio
      8 PCI Express 3.0/2.0 Slot
      ASUS SafeSlot Core Support
      9

      Audio Features

      • LED-Illuminated Design
      • Audio Shielding
      • Dedicated audio PCB Layers
      • Premium Japanese Audio Capacitors
      10 DIGI+VRM & EPU
      11 DDR4 Support
      12 AMD AM4 Socket
      13 M.2 x 4 Support
      Both SATA & PCIe mode
      14 AMD B350 Chipset
      15 6 x SATA 6.0Gb/s Ports
      16 2 x Front USB 3.0

      ASUS Prime is the next evolution of the ASUS motherboard, born of a pedigree that stretches back to 1989. Our team of world-class engineers are passionate about empowering everyone to enjoy the benefits of customization and tuning, and the driving force behind the development of Prime is to make advanced enthusiast controls easily accessible — maximizing performance, stability and compatibility for the very best DIY PC experiences. Simply stated: it's time for Prime.

      Reliable Stability and Compatibility
      Built to Last
      ASUS is the world's foremost motherboard manufacturer, renowned for our unique Design Thinking approach. Our exhaustive testing exceeds industry standards, supported by high-quality components for exceptional real-world protection. Our motherboards are proven to be compatible with more than 1,000 components and devices, and each new model undergoes a minimum of 8,000 hours of strict validation. ASUS gives you the peace of mind of knowing that your motherboard is fit for all environments and applications. By choosing ASUS, you also gain the freedom to select outstanding component options, for trouble-free DIY experiences.

      5X

      Protection III

      Hardware safeguards to ensure long-term durability.

      350+

      DDR4 Compatibility

      Industry-leading DDR4 memory compatibility for best flexibility and reassurance.

      1000+

      Compatible Devices

      Compatibility with a range of CPUs, memory modules, graphics cards and more.

      8000+

      Validation Hours

      Extensive testing with latest components for enhanced reliability, compatibility and safety.

      PRIME B350 series motherboards are engineered with industry-leading 5X Protection III, employing the finest components, excellent circuit design, and exacting standards to guarantee the quality and long-term durability of your motherboard. That means exceptional protection and stability for your build — thanks to decades of engineering experience from the world's leading motherboard brand.

      SafeSlot Core
      Fortified PCIe slot prevents damage
      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.

      ASUS Prime motherboards have strengthened solder points around both the PCIe and DIMM pins.

      LANGuard
      Pumped-up throughput. 2.5x higher surge tolerance.
      ASUS LANGuard is hardware-level networking protection that employs signal-coupling technology and premium anti-EMI surface-mounted capacitors to ensure a more reliable connection and better throughput, plus electrostatically guarded and surge-protected components for greater tolerance to static electricity and improved protection against surges.
      * ESD result is undertaken by individual LANGaurd

      EMI cover

      Anti-EMI
      surface-mounted
      capacitors


      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      Overvoltage Protection
      World-class circuit-protecting power design
      An exclusive circuit design with built-in voltage regulators to protect your chipset, connectivity ports, and audio codecs from damage caused by unexpected high-level voltages from unstable or inferior power supplies. * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      DIGI+ VRM

      Precision control for stable power
      ASUS-exclusive DIGI+ VRM intelligently delivers power to the processor based on real-time demands, reducing energy waste and improving system stability.

      DRAM Overcurrent Protection

      Short-circuit damage prevention
      Onboard resettable fuses prevent overcurrent and short-circuit damage. This extends beyond I/O ports to DRAM to safeguard the lifespan of your system and connected devices.

      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.

      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      ESD Guards
      Electrostatic discharge protection
      ASUS ESD Guards prevent damage from electrostatic discharge, up to +/- 10kV for air discharge and +/- 6kV for contact discharge, arranged in an active-protective-circuit design that prolongs the life of components.
      1
      LAN port
      ESD TVS diode protection on the LAN circuit.
      2
      USB connectors
      TVS diodes for surface-mount and dual-inline packages.
      3
      VGA connectors
      Additional on-circuit ESD TVS diodes to protect D-Sub functionality.
      4
      Keyboard and mouse connectors
      Additional on-circuit ESD transient-voltage-suppression.

      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      Proven Compatibility
      Tested to be compatible with 1,000+ CPUs, DDR4 memory modules, graphics cards and more
      Having the freedom to pick and choose the parts that go into your machine is at the heart of PC DIY. Our extensive certification program focuses on providing the very best compatibility with the widest range of components and devices, giving you the freedom to build and upgrade without frustration. Compatible today and compatible far into the future – that's the ASUS way.
      Extensive List of Supported Devices
      View supported devices and Qualified Vendor List for compatible memory
      The superior compatibility of Prime B350 series is evidenced by our extensive list of supported devices — which includes thousands of compatible components — and our Qualified Vendor List that identifies memory compatibility. That means more choices for worry-free PC-building experiences.
      Great Compatibility
      with ASUS Products
      ASUS offers a suite of proprietary components — graphics cards, sound cards, optical drives — that perfectly complement Prime B350 series, so you can complete your custom motherboard build with confidence!

      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      Top-to-bottom Reliability
      ASUS motherboards have superb endurance. We verify this by subjecting every board to more than 8,000 hours of stringent tests. A barrage of burn-in, environmental, compatibility, software and safety tests confirm that our motherboards are exceptionally robust. It also shows that ASUS reliability surpasses industry standards, ensuring that every component is designed to function flawlessly in any environment.
      8000+
      VALIDATION HOURS
      Temperature and Humidity Test
      Ensures components withstand extreme conditions.
      Thermal Measurement Test
      Ensures that the system remains cool and stable under the heaviest loads.
      Insertion Test
      Every port and connector is put through repeated installation cycles.
      Aging Test
      Up to 48-hour aging test ensures reliability.
      Power Consumption Test
      Checked for world-class energy efficiency.
      Temperature and DC Margin Test
      Ensures that the motherboard is capable of coping with Voltage fluctuations caused by varying temperatures.
      Thermal Shock Test
      Ensures ability to survive temperature changes during transportation.
      Non-Operation Shock Test
      Built to withstand jolts that may occur during shipping.
      Burn-In Test
      Every component is checked to ensure flawless operation in any environment.
      Installation Test
      Connector placement is double-checked to ensure hassle-free installation.
      Drop Test
      Drop tests from various heights ensure durability.
      Salt and Spray Test
      Tested for I/O reliability, prolonged lifespan and rust-resistance.
      Superb Performance
      DDR4 Support
      With DDR4, you'll accelerate memory frequencies up to an incredible to 3200MHz! And ASUS works with almost every DDR4 memory vendor, so you're assured the best compatibility.

      Enjoy the DDR4 benefits with Prime B350 series. (DDR4 vs DDR3)

      2X

      faster write
      read speeds

      2X

      larger
      capacity

      20%

      lower power
      consumption

      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      Optimized Cooling
      Fan Xpert
      Dedicated CPU and case fan controls

      Exclusive Fan Xpert ensures every fan achieves the best balance of cooling performance and low noise - and with Prime B350 series boards and their hardware-level 4-pin/3-pin PWM/DC mode for case fans, a simple BIOS adjustment lets you run your case fan in PWM/DC. Fan Xpert even includes Auto-Tuning mode to scan and detect all fan characteristics for single-click customization!

      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      Fan Xpert 2
      Game in Your Way
      Brighten Up Your Build
      LED-illuminated control for trace paths
      Built-in LED lighting options can illuminate your build in a variety of mesmerizing styles. With specially-designed Fan RGB header control, you can even personalize your own fan lighting scheme with the exclusive AMD RGB Fan!

      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      Gaming Audio
      Combined onboard features deliver elevated audio 
      Intelligent design and premium hardware create audio quality unlike anything you've ever experienced!
      1
      Noise isolation

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

      2
      Dedicated Audio PCB Layers

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

      3
      Audio Enjoyment

      Premium Japanese audio capacitors provide warm, natural, and immersive sound with exceptional clarity and fidelity.

      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      All-round Energy Saving
      Energy Efficient Design
      EPU

      With the Energy Processing Unit (EPU) you'll enjoy system power savings. EPU automatically optimizes power consumption, and maximizes savings with Away mode.

      Ultrafast Transfer Speeds
      10Gb/s USB 3.1 Onboard
      With backward-compatible USB 3.1 Type-A, you'll experience ultimate connection flexibility and blazing data-transfer speeds of up to 10Gb/s (twice as fast as standard USB 3.0).
      Speed Up with Onboard M.2 Up to 32Gb/s
      With x4 PCI Express 3.0/2.0 bandwidth, M.2 supports up to 32Gb/s data-transfer speeds. It is the perfect choice for an operating system or application drive, making your whole PC or professional apps work as fast as possible.


      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      Easy PC DIY
      Safe Motherboard Mounting
      Component-free areas to minimize damage risk
      Fitting your ASUS motherboard is now safer than ever. The comprehensive component-free 'safe zones' around every case-mounting hole minimizes the risk of damage and short circuits caused by contact - so you'll assemble your PC with total confidence!
      Q-Slot
      Effortless PCI Express component removal
      The large winged clip is easy to reach and easy to operate. Just press the Q-Slot clip lightly, and the graphics card pops out. Installing or removing even the biggest graphics cards is no sweat!
      Q-DIMM
      Easy memory removal
      Even if you work with a smaller case, just push down on the one-sided clip and push or pull RAM modules in or out - removing memory is that simple!
      One-Stop Controls
      Media-acclaimed UEFI BIOS
      The smoothest, slickest mouse-controlled graphical BIOS has been improved to make it even more appealing. Whether you're a PC novice or a seasoned overclocker, EZ and Advanced modes help you find your way, quickly and easily.
      EZ Flash 3
      Update the BIOS via the internet, without leaving the BIOS interface.
      S.M.A.R.T
      Check your storage device Self-Monitoring, Analysis, and Reporting Technology logs to gauge reliability and possibly to determine potential failures.
      Q-Fan Control
      You can configure the fan's operating speed manually, or use the easy pre-configured fan profiles to select Standard, Silent, Turbo, or Full Speed modes!
      My Favorite
      Quickly find tuning options and add preferred tools to the list.
      EZ mode
      • Intuitive graphical fan control Fine-tune individual fans simply by dragging a curve with the mouse.
      • EZ XMP Improve DRAM performance with a click.
      • SATA information Easily display SATA port details for device identification.
      • Fast clock adjustment Use mouse controls to quickly change time and date settings.
      Advanced mode
      • Last modified log Track last change and save preferred profiles onto a USB drive.
      • SATA port renaming Rename SATA ports for easy identification.
      AI Suite 3
      One-stop access to innovative ASUS features
      ASUS AI Suite 3 offers a brand-new user experience through a clearer and more attractive interface with support for larger monitors. It consolidates all exclusive ASUS features into one simple-to-use package, allowing you to supervise overclocking, energy consumption, fan speeds, voltages and more. This all-in-one app offers diverse and easy-to-use functionality, with no need to switch back and forth between different utilities.


      * Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.

      AMD CPU and Chipset Features
      Ready for AMD AM4-socket Ryzen, 7th Generation A-series APUs and Athlon APUs
      This motherboard supports AMD® Ryzen™ processors, 7th Generation A-series accelerated processing units (APUs) and Athlon™ CPUs. The high-performance Ryzen™ processor supports up to eight cores, and is based on the innovative Zen core architecture . The 7th Generation A-series APUs feature integrated AMD Radeon R-series graphics. AMD AM4-socket processors feature dual-channel DDR4 memory, native 5Gbps USB 3.0 and 16 PCI Express® 3.0/2.0 lanes for superb performance.
      AMD B350 Chipset
      The AMD B350 chipset delivers outstanding overclocking capabilities for the latest AMD® AM4-socket Ryzen™ processors, 7th Generation A-series APUs and Athlon™ CPUs. It provides two 10Gbps USB 3.1 ports, two USB 3.0 ports, and four 6Gbps SATA ports for faster data retrieval.

      Overview Content

      • Reliable Stability and Compatibility
      • Superb Performance
      • Optimized Cooling
      • Game in Your Way
      • All-round Energy Saving
      • Ultrafast Transfer Speed
      • Easy PC DIY
      • One-Stop Controls