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    ASUS Prime B450M-A II AMD AM4 (Ryzen 5000, 3rd/2nd/1st Gen Ryzen Micro ATX Motherboard (128GB DDR4, 4400 O.C.), NVMe, HDMI 2.0b/DVI/D-Sub, USB 3.2 Gen 2, BIOS Flashback, and Aura Sync)

    (1,179)(51) Write a Review
    • PRIME B450M-A II
    • TUF GAMING B450-PLUS II
    • TUF GAMING B450M-PLUS II
    • AMD AM4 Socket : Compatible to Ryzen 5000, 3rd/2nd/1st Gen AMD Ryzen CPUs.Operating System : Windows 10 64-bit. Windows 7 64-bit
    • Designed for Productivity: USB 3.2 Gen 2 with 10Gbps ultra-fast transfer speed, onboard M.2 support, 4xDIMMs support up to 128GB DDR4 with 4400 (O.C.) performance, HDMI 2.0b/DVI/D-Sub
    • Optimized Cooling: VRM and PCH heatsink with extensive surface, thermal pads help transfer heat from the inductor and phase array to the heatsink. Flexible fan controls for ultimate cooling and quietness with ASUS exclusive Fan Xpert 2 plus
    • Built to Last: all-round protection with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and stainless-steel back I/O, 1000 plus compatible devices, 8000 plus Validation Hours
    • PC DIY Friendly: With BIOS
    +
    +
    Overview
    Specs
    Reviews (1,179)
    AMD B450 (Ryzen AM4) micro ATX motherboard with M.2 support, HDMI/DVI-D/D-Sub, SATA 6 Gbps, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A, BIOS FlashBack™, and Aura Sync RGB lighting support
    • Comprehensive cooling: VRM heatsink, PCH heatsink, and Fan Xpert 2+
    • Ultrafast connectivity: M.2 support, 1 Gb Ethernet, and USB 3.2 Gen 2 Type-A
    • 5X Protection III: Multiple hardware safeguards for all-around system protection
    • Aura Sync RGB Lighting: Onboard connector for RGB LED strips, easily synced with an ever-growing portfolio of Aura Sync-capable hardware
    1. BIOS FlashBack™
      button
    2. D-Sub
    3. DVI-D
    4. HDMI
    5. PS/2
    6. 2 x USB 3.2 Gen 1
    7. 2 x USB 3.2 Gen 2
    8. Realtek LAN
    9. 2 x USB 3.2 Gen 1
    1. 3 x Audio jacks
    2. PCIe 3.0 x16
      • ASUS SafeSlot Core
    3. Audio Features
      • LED-Illuminated design
      • Audio Shielding
      • Premium Japanese
        Audio Capacitors
      • Dedicated Audio
        PCB Layers
    4. RGB header
    1. DIGI+ VRM & EPU
    2. DDR4 Support
    3. AMD AM4 Socket
    4. 32 Gb/s M.2 support
      PCIe 3.0 x4 & SATA mode
    5. 2 x SATA 6 Gb/s
    6. AMD B450 Chipset
    7. 4 x SATA 6 Gb/s
    8. 2 x Front USB 3.2 Gen 1
    9. 4 x Front USB 2.0

    ASUS Prime B450M II Series motherboards provide the solid foundation needed for your first build, plus flexibility to grow with your ambitions. We've melded all the good stuff that's packed into AMD Ryzen™ processors with essential ASUS design and engineering, so you benefit from industry-leading technologies — including automated system tuning, comprehensive cooling controls, and immersive onboard audio. When you build with an ASUS Prime B450M II Series motherboard, you build smart, easy and affordably.

    Tune It Your Way

    Comprehensive controls form the foundation of the ASUS Prime series. The Prime B450M II 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.
    Intelligent Control
    EPU

    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.
    Fan Xpert 2+

    Flexible Cooling Controls

    Fan Xpert 2+ software provides comprehensive control over system fans. 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.
    Digi+ VRM Control

    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.

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

    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.
    EZ Mode

    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.

    EZ XMP
    Improve DRAM performance with one click.

    Aura On/Off mode (Stealth)
    Easily enable or disable Aura RGB lighting or every onboard LED, for a subdued aesthetic touch.
    Cool to the Core

    Prime B450M II 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.
    Heatsinks


    VRM Heatsink and Thermal Pads

    A VRM heatsink with underneath thermal pad improves heat transfer from the MOSFETs for better cooling performance.
    Cooler by Design

    Prime B450M-A II 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.
    Multiple Temperature Sources

    Each header can monitor and react to dedicated thermal sensors.
    Smart Protection

    A dedicated integrated circuit protects the fan headers, including short circuit and over temperature protections.
    4-Pin PWM/DC Fan

    Each onboard CHA FAN header supports PWM and DC mode.
    Build on a Solid Foundation

    Prime B450M II 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.
    Storage
    PCIe 3.0 M.2 (up to 32 Gbps)

    Achieve speed with onboard M.2

    M.2 Slot supports up to 22110 and data-transfer speed up to 32 Gbps via x4 PCI Express® 3.0 bandwidth. It‘s the perfect choice for an operating system or application drive, providing fast access to data.
    Connectivity
    USB 3.2 Gen 2 Type-A

    Numerous USB ports support high-end rigs loaded with peripherals, including two rear-panel USB Type-A connectors with fast USB 3.2 Gen 2 connectivity for compatible cases.
    Little Things Make a Big Difference

    Prime B450M II 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 unique personal look.
    Audio


    Outstanding Audio

    Combined onboard features deliver elevated audio

    Intelligent design and premium hardware create audio quality unlike anything you've ever experienced.
    Audio Shielding

    Separates analog/digital signal domains, significantly reducing multi-lateral interference.

    Separate Layer for Left and Right Tracks

    Ensures minimal crosstalk between audio paths.

    Premium Japanese Capacitors

    Premium parts provide an immersive sound signature, with exceptional 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 RGB LED strips connected to the onboard RGB headers. And it can all be synced with an ever-growing portfolio of Aura-capable hardware.
    Static
    Breathing
    Strobing
    Rainbow
    Color Cycle
    Starry Night
    Music Effect
    Smart
    Armoury Crate

    Armoury Crate is a new software utility designed to give you centralized control of supported products. From a single intuitive interface, Armoury Crate allows you to easily customize RGB lighting and effects for every compatible device in your arsenal. The software also provides control of settings for ASUS products, including keyboard and mouse preferences. Armoury Crate even features dedicated product registration and highlight to help you stay in touch with the ASUS community.
    Aura Sync

    Driver & Manual Download

    Driver & Manual Download

    Account Management

    Account Management

    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 having memory or a CPU installed.
    DIY friendly
    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.
    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.
    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.
    LANGuard

    Pumped-up throughput 2.5X higher surge tolerance

    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.
    1000+

    Compatible devices and components

    The Prime B450M II series provides superior compatibility with thousands of components and our Qualified Vendor List (QVL) 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

    Ensures components withstand extreme conditions.

    Thermal measurement tests

    Ensures that the system remains cool and stable under the heaviest loads.

    Insertion tests

    Every port and connector is put through repeated installation cycles.

    Aging tests

    Up to 48-hour aging test ensures reliability.

    Power-consumption tests

    Checked for world-class energy efficiency.

    Temperature and DC margin tests

    Ensures that the motherboard is capable of coping with voltages fluctuations caused by varying temperatures.

    Thermal-shock tests

    Ensures ability to survive temperature changes during transportation.

    Non-operation shock tests

    Built to withstand jolts that may occur during shipping.

    Burn-in tests

    Every component is checked to ensure flawless operation.

    Installation tests

    Connector placement is double-checked to ensure hassle-free installation.

    Drop tests

    Drop tests from various heights ensure durability.

    Salt and spray tests

    Tested for I/O reliability, prolonged lifespan and rust-resistance.
    • Products certified by the Federal Communications Commission and Industry Canada will be distributed in the United States and Canada. Please visit the ASUS USA and ASUS Canada websites for information about locally available products.
    • All specifications are subject to change without notice. Please check with your supplier for exact offers. Products may not be available in all markets.
    • Specifications and features vary by model, and all images are illustrative. Please refer to specification pages for full details.
    • PCB color and bundled software versions are subject to change without notice.
    • Brand and product names mentioned are trademarks of their respective companies.
    • Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.
    • *Precise specifications and features vary by model . Please refer to the specification page
    • The product (electrical , electronic equipment, Mercury-containing button cell battery) should not be placed in municipal waste. Check local regulations for disposal of electronic products.
    • The use of trademark symbol (TM, ®) appears on this website means that the word text, trademarks, logos or slogans, is being used as trademark under common laws protection and/or registered as Trademark in U.S. and/or other country/region.
    About ASUS

    ASUS aspires to deliver the incredible in everything it does. With more than 17,000 employees around the globe with a world-class R&D team of 5,500 engineers, ASUS is dedicated to the design and manufacture of products that perfectly meet the needs of today’s (and tomorrow’s) digital home and office. ASUS’ broad portfolio includes motherboards, graphics cards, displays, desktop PCs, all-in-one PCs, laptops, servers, wireless networking devices, tablets, smartphones and wearables. Driven by innovation and committed to quality, the company won 4,385 awards and earned approximately US$13.3 billion of revenue in 2016.

    © 2020 ASUS Computer International. All Rights Reserved. ASUS is a registered trademark of ASUSTeK Computer. All specifications and terms are subject to change without notice. Please check with your supplier for exact offers on selected models. Products may not be available in all markets. Product may not be exactly as shown in photos. Actual colors may differ from their appearance due to variation of monitor restrictions and color processing. All trademarks are registered to their respective companies. ASUS shall not be liable for technical or editorial errors or omissions contained herein.

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