PRIME B450M-A|Motherboards|ASUS USA (2023)

Tune it your way
Ultrafast connectivityReliable stability and compatibilityUpgrade to unrivalled audioVisual beauty, virtual worlds

PRIME B450M-A|Motherboards|ASUS USA (6)

PRIME B450M-A|Motherboards|ASUS USA (7)

1D-Sub Port

2DVI-D Port

3HDMI Port

4USB 3.1 Gen 1 Ports

5USB 3.1 Gen 2 Ports




PCI Express 3.0

  • ASUS Safe Slot Core support


Audio Features

  • LED-Illuminated Design
  • Audio Shielding
  • Dedicated audio PCB layers
  • Premium Japanese
    audio capacitors



12AMD AM4 Socket

1332Gb/s M.2 Support
SATA & PCIE x4 mode

14AMD B450 Chipset

156 x SATA 6Gb/s

16Front USB 3.1 Gen 1

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ASUS Prime B450 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 B450 Series motherboard, you build smart, easy and affordably.

Tune it your way

PRIME B450M-A|Motherboards|ASUS USA (9)PRIME B450M-A|Motherboards|ASUS USA (10)EPU

PRIME B450M-A|Motherboards|ASUS USA (11)PRIME B450M-A|Motherboards|ASUS USA (12)Fan Xpert 2+

All-round 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.

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Flexible cooling controls

Prime B450 Series motherboards offer comprehensive control over system fans, via the included Fan Xpert 2+ software. Auto-Tuning mode intelligently configures all parameters with a single click.

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Cooler by design

Prime B450 Series features the most comprehensive cooling controls ever, configurable via ASUS Fan Xpert software or the UEFI BIOS.

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PRIME B450M-A|Motherboards|ASUS USA (16)PRIME B450M-A|Motherboards|ASUS USA (17)

PRIME B450M-A|Motherboards|ASUS USA (18)PRIME B450M-A|Motherboards|ASUS USA (19)Multiple temperature sources

PRIME B450M-A|Motherboards|ASUS USA (20)PRIME B450M-A|Motherboards|ASUS USA (21)4-pin PWM/DC fan

Each header can monitor and react to dedicated thermal sensors.

Each onboard CHA FAN header supports PWM and DC mode.

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

Make your memory faster

Featuring an array of trace layout tweaks that improve memory stability, PRIME B450 Series provides a potent foundation for your build.With comprehensive support for the full gamut of Ryzen memory configurations – from entry-level to performance-oriented — PRIME B450 Series is a versatile all-rounder that can work or play.

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Media-acclaimed UEFI BIOS

The UEFI BIOS is an early waypoint on any PC-building journey, and Prime B450 Series has one of the best in the business.

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Q-Fan ControlCan configure the fan's operating speed manually, or use the easy pre-configured fan profiles to select Standard, Silent, Turbo or Full Speed modes, plus automatic switch to full speed if the temperature hits 75°C.

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Search FunctionWhen you're ready for a deeper dive, Advanced mode enables full control over every aspect of the motherboard — with a built-in Search function to find the setting you need in the blink of an eye.

Learn more

EZ mode

EZ Tuning WizardQuickly apply a CPU overclock to improve system performance, or configure a RAID array for faster data retrieval and backups

Intuitive graphical fan controlFine-tune individual fans simply by dragging a curve with the mouse.

SATA Information: Display SATA port details that help you easily recognize drives.

Fast Clock Adjustment: Use mouse controls to change the time and date.

Advanced mode

My FavoritesQuickly find tuning options and add preferred tools to the list.

User ProfileSave BIOS settings for migration to new BIOS version or system.

SATA Port Renaming: Rename SATA ports for easy identification.

Ultrafast connectivity

USB 3.1 Gen 2 Type-A

Ultimate-speed 10Gbps with USB 3.1 Gen 2 onboard

With backward-compatible USB 3.1 Gen 2 Type-A™, you'll experience ultimate connection flexibility and blazing data-transfer speeds of up to 10Gbps — twice as fast as standard USB 3.1 Gen 1.

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

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USB 3.1 Gen 1 front-panel connector

Future-proof connectivity

USB 3.1 Gen 1 is right where you need it, with two super-speed headers for the front panel. Experience data-transfer speeds up to 10X faster than USB 2.0 with instant plug-and-play connectivity, and avoid back-breaking contortions in the hunt for hard-to-reach rear ports.

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

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Speed up with onboard M.2

With x4 PCI Express® 3.0/2.0 bandwidth, M.2 supports up to 32Gbps data-transfer speeds. It's the perfect choice for an operating system or application drive, providing fast access to data.

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


Affordable acceleration for any hard drive

AMD StoreMI technology is a software utility that accelerates any drive for better system responsiveness with reduced startup and software load times. It combines SSD performance with the affordability and capacity of an HDD by automatically moving frequently accessed data to dedicated SSD storage.

For more detailed information, please refer to AMD official website :

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Native M.2/NVMe PCIe RAID Support for
Lightning Fast Storage Speed!

Not satisfied with single-storage device read/write speeds? Then join the fast lane and build a RAID 0 array using two PCIe storage drives to enjoy data transfers at lightning speeds.

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Reliable stability and compatibility

Built to Last

ASUS is the world's leading motherboard brand. Our motherboards are extensively tested for compatibility with more than 1,000 components and devices, and each new model undergoes a minimum of 8,000 hours of strict validation — offering the peace of mind of knowing that your ASUS motherboard is fit for all environments and applications. Choosing ASUS is an assurance of trouble-free DIY experiences.


Protection III

Hardware safeguards to ensure long-term durability.

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DDR4 compatibility

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

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compatible devices

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

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validation hours

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

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Prime B450 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 investment. That means exceptional protection and stability for your build — thanks to decades of engineering experience from the world's leading motherboard brand.

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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.

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Our Prime B450 Series motherboards also have strengthened solder points around both the PCIe and DIMM pins.

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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.

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Overvoltage Protection

World-class circuit-protecting power design

An exclusive circuit design with built-in voltage regulators protects your motherboard from damage caused by unexpected high-level voltages from unstable or inferior power supplies.

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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.

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DRAM Overcurrent Protection

Short-circuit damage prevention

Onboard resettable fuses prevent overcurrent and short-circuit damage. This extends beyond I/O ports to DRAM ― so it provides a safeguard to protect the lifespan of your system and connected devices.

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Stainless-steel back I/O panel

3X corrosion-resistance for greater durability

Corrosion-resistant stainless-steel back I/O panels bonded with chromium oxide assure a lifespan that's 3X longer than ordinary panels.

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ESD Guards

Electrostatic discharge protection

ASUS ESD Guards prolong the life of components while preventing damage from electrostatic discharge, providing protection for up to +/- 10kV of air discharge and +/- 6kV of contact discharge.


Compatible devices and components

The superior compatibility of Prime B450 Series is evidenced by our extensive list of supported devices — which includes thousands of compatible components — and our Qualified Vendor List (QVL) that identifies memory compatibility. It all adds up to more choices for worry-free PC-building experiences.



ASUS motherboards offer 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.

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Temperature and humidity tests

Ensures components withstand extreme conditions.

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Thermal measurement tests

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

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Insertion tests

Every port and connector is put through repeated installation cycles.

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Aging tests

Up to 48-hour aging test ensures reliability.

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Power-consumption tests

Delivers world-class energy efficiency.

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Temperature and DC margin tests

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

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Thermal-shock tests

Ensures ability to survive temperature changes during transportation.

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Non-operation shock tests

Built to withstand jolts that may occur during shipping.

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Burn-in tests

Every component is checked to ensure flawless operation.

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Installation tests

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

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Drop tests

Drop tests from various heights ensure durability.

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Salt and spray tests

Tested for I/O reliability, prolonged lifespan and rust-resistance.

Upgrade to unrivalled audio

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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 audio capacitors

Premium parts provide an immersive sound signature, with exceptional fidelity.

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

Visual beauty, virtual worlds

Aura Sync

Outshine the competition

A well-tuned enthusiast system deserves a matching aesthetic. ASUS Aura Sync offers full lighting connected via the motherboard's RGB header, with a variety of functional presets for external LED strips.* And it can all be synced with an ever-growing portfolio of Aura-capable ASUS hardware.

Learn more >

PRIME B450M-A|Motherboards|ASUS USA (56)Static

PRIME B450M-A|Motherboards|ASUS USA (57)Breathing

PRIME B450M-A|Motherboards|ASUS USA (58)Strobing

PRIME B450M-A|Motherboards|ASUS USA (59)Rainbow

PRIME B450M-A|Motherboards|ASUS USA (60)Color cycle

PRIME B450M-A|Motherboards|ASUS USA (61)Comet

PRIME B450M-A|Motherboards|ASUS USA (62)Flash &

PRIME B450M-A|Motherboards|ASUS USA (63)Wave

PRIME B450M-A|Motherboards|ASUS USA (64)Glowing
Yo Yo

PRIME B450M-A|Motherboards|ASUS USA (65)Starry

PRIME B450M-A|Motherboards|ASUS USA (66)Music

PRIME B450M-A|Motherboards|ASUS USA (67)CPU

* The Aura RGB-strip header supports 5050 RGB LED strips with a max power rating of 3A (12V). For maximum brightness, strip length should not exceed 3m.
LED strips and Aura Sync-compatible devices are sold separately.

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

Brighten Up Your Build

LED-illuminated control for PCIe slot and trace paths

Built-in LED lighting options illuminate your build in a variety of eye-catching styles.

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

Beyond VR ready

Complete your immersion

Prime B450 series isn't just VR ready — it goes way beyond. The ASUS Beyond VR Ready marque means that Prime B450 series has been tested with loads of class-leading components to ensure that your productivity, gaming and entertainment needs are tuned for maximum performance. ASUS Beyond VR Ready opens up a new way to configure and build your dream system with total confidence.

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PRIME B450M-A|Motherboards|ASUS USA (72)

AMD AM4 Socket for 3rd/2nd/1st Gen AMD Ryzen / 2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics / Athlon with Radeon Vega Graphics ProcessorsThe AMD Ryzen™ processor is based on the innovative Zen core architecture and features up to eight cores and Radeon™ Vega integrated graphics. Together with dual-channel DDR4 memory, native 5Gbps USB 3.1 Gen 1 and 16 PCI Express® 3.0/2.0 lanes, these AMD AM4-socket processors deliver superb computing performance.

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AMD B450 chipsetThe AMD B450 chipset delivers high performance and flexibility with the latest AMD® AM4-socket Ryzen™ processors. It also offers AMD StoreMI storage acceleration technology and provides two 10Gbps USB 3.1 Gen2 ports, two USB 3.1 Gen1 ports, and four 6Gbps SATA ports for faster data retrieval.

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