90MB1600-M0EAY0

About this product

Upgrade your PC build with the Asus PRIME B450M-K II motherboard. Designed for AMD Ryzen processors, this micro ATX board offers reliable performance, comprehensive connectivity, and essential features for both work and play.

Overview Summary

Description

The Asus PRIME B450M-K II motherboard is engineered to deliver stable and efficient performance for users seeking to build or upgrade their systems without breaking the bank. Its micro ATX form factor ensures compatibility with a variety of cases, making it a versatile choice for compact builds. The board supports AMD Ryzen processors on the AM4 socket, providing a solid foundation for both productivity and light gaming tasks.

Equipped with one PCIe 3.0 x16 slot and one M.2 slot, the motherboard offers flexibility for storage and expansion. The M.2 slot supports both PCIe 3.0 x4 and SATA modes, allowing users to choose between speed and cost-efficiency. Additionally, four SATA 6Gb/s ports provide ample room for traditional hard drives or SSDs.

Connectivity is a strong suit of the PRIME B450M-K II, featuring HDMI, DVI-D, and D-Sub ports for video output, ensuring compatibility with a wide range of monitors. The inclusion of USB 3.2 Gen 1 Type-A ports facilitates fast data transfer speeds, enhancing the overall user experience.

Designed with durability in mind, the motherboard incorporates Asus's 5X Protection III, which includes safeguards like overvoltage protection and reinforced PCIe slots, ensuring longevity and reliability. Whether you're assembling a home office PC, a budget gaming rig, or a media center, the Asus PRIME B450M-K II provides the essential features needed for a smooth computing experience.

Features

• Supports AMD Ryzen processors on AM4 socket
• Micro ATX form factor for compact builds
• One PCIe 3.0 x16 slot for graphics card
• One M.2 slot supporting PCIe 3.0 x4 and SATA modes
• Four SATA 6Gb/s ports for additional storage
• Connectivity options include HDMI, DVI-D, and D-Sub ports
• USB 3.2 Gen 1 Type-A ports for fast data transfer
• Supports up to 64GB DDR4 memory at speeds up to 4400MHz (OC)
• Asus 5X Protection III for enhanced durability
• LED illumination for aesthetic appeal

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.

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.

EZ XMP
Improve DRAM performance with one click.

Cooler by Design
PRIME B450M-K II is engineered with an array of hybrid fan headers and features comprehensive cooling controls that are configurable via Fan Xpert 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 header, including short circuit and over temperature protections.

4-Pin PWM/DC Fan
The 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.

Achieve speed with onboard M.2
M.2 Slot supports data-transfer speed up to 32Gbps via x4 PCI Express(RegTM) 3.0 bandwidth. It‘s the perfect choice for an operating system or application drive, providing fast access to data.

USB 3.2 Gen 1 Type-A
Numerous USB ports support high-end rigs loaded with peripherals, including four rear-panel USB Type-A connectors with fast USB 3.2 Gen 1 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 interface that let you customize your system to create a unique personal look.

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.

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 provides control of settings for ASUS products, including keyboard and mouse preferences. This software even features dedicated product registration and highlight to help you stay in touch with the ASUS community.

BIOS FLASHBACK(TM)
BIOS FlashBack(TM) 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(TM) port and press the button. Updates can even be performed without having memory or a CPU installed.

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.

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.

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.

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.

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.

What's in the Box

• Asus PRIME B450M-K II motherboard
• IO shield
• Motherboard user guide
• Driver and utility DVD
• 2 x SATA 6Gb/s cables

Specifications

© 2026 Respective owners and brand holders. This table has been carefully researched and generated by ComXpert International CC (//www.comx.co.za), however, errors and omissions may occur. Only references to South Africa apply. All products are sourced in South Africa from the official suppliers and the warranty is that of the local supplier. E&OE. This table and our site's content may be used on condition that this notice and link remains intact and unaltered.
Specifications and features
Product Code	90MB1600-M0EAY0
Model	PRIME B450M-K II
CPU	* Refer to for CPU support list., AMD AM4 Socket for AMD Ryzen 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3rd/2nd/1st Gen AMD Ryzen / 2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics/ Athlon with Radeon Vega Graphics Processors
Chipset	AMD B450
Memory	* Refer to for the Memory QVL (Qualified Vendors Lists)., 2 x DIMM, Max. 64GB, DDR4 4400(O.C) / 4000(O.C.) / 3866(O.C.) / 3733(O.C.) / 3600(O.C.) / 3466(O.C.) / 3400(O.C.) / 3300(O.C.) / 3200(O.C.) / 3000(O.C.) / 2933(O.C.) / 2800(O.C.) / 2666 / 2400 / 2133 MHz Un-buffered Memory *, 3rd/2nd/1st Gen AMD Ryzen / 2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics/ Athlon with Radeon Vega Graphics Processors, Dual Channel Memory Architecture, ECC Memory (ECC mode) support varies by CPU., * The maximum memory frequency supported varies by processor.
Graphic	1 x HDMI port, Integrated Graphics in the 2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics/ Athlon with Radeon Vega Graphics Processors *, *Graphics specifications may vary between CPU types.
Expansion Slots	3rd/2nd/1st Gen AMD Ryzen Processors, 1 x PCIe 3.0 x16 (x4 mode), AMD B450 chipset, 1 x PCIe 3.0 x16 (x16 mode), 1 x PCIe 3.0 x16 (x8 mode), AMD Athlon with Radeon Vega Graphics Processors, 2 x PCIe 2.0 x1
Storage	Total supports 1 x M.2 slot(s) and 4 x SATA 6Gb/s ports, Athlon with Radeon Vega Graphics Processors :, 3rd/2nd/1st Gen AMD Ryzen / 2nd and 1st Gen AMD Ryzen with Radeon Vega Graphics :, AMD B450 chipset : ,1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode), 1 x M.2 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA mode), 4 x SATA 6Gb/s port(s), Support Raid 0, 1, 10
LAN	ASUS LANGuard, Realtek RTL8111H
Audio	Realtek ALC887/8977.1-Channel High Definition Audio CODEC *, - Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192kHz playback, - LED-illuminated design, - Audio Shielding, - Dedicated audio PCB layers, - Premium Japanese audio capacitors, Audio Feature :, * Choose the chassis with HD audio module in front panel to support 8-channel audio output.
USB Ports	Front USB Port ( Total 6 ), Rear USB Port ( Total 6 ),4 x USB 3.2 Gen 1 port(s)(4 x Type-A), 2 x USB 2.0 port(s)(2 x Type-A), 2 x USB 3.2 Gen 1 port(s), 4 x USB 2.0 port(s)
Software Features	ASUS Exclusive Software
	Armoury Crate
	AI Suite 3
	- Performance and Power Saving Utility
	TurboV EVO
	EPU
	DIGI+ VRM
	Fan Xpert
	PC Cleaner
	- EZ update
	- System Information
	ASUS CPU-Z
	AI Charger
	ASUS EZ Installer
	DAEMON Tools
	Norton Anti-virus software (Free Trial for 60 days)
	WinRAR
	UEFI BIOS
	ASUS EZ DIY
	- ASUS CrashFree BIOS 3
	- ASUS EZ Flash 3
	- ASUS UEFI BIOS EZ Mode
ASUS Special Features	ASUS 5X PROTECTION III
	- ASUS DIGI+ VRM
	- ASUS LANGuard
	- ASUS Overvoltage Protection
	- ASUS SafeSlot Core
	- ASUS Stainless-Steel Back I/O
	ASUS Q-Design
	- ASUS Q-DIMM
	- ASUS Q-Slot
	ASUS Thermal Solution
	- Aluminum heatsink design
	ASUS EZ DIY
	- BIOS FlashBack button
	- BIOS FlashBack LED
	ASUS Lighting Control
Back I/O Ports	1 x BIOS FlashBack<sup> </sup> Button(s), 4 x USB 3.2 Gen 1 (blue) Type-A, 1 x PS/2 keyboard/mouse combo port(s), 1 x DVI-D, 1 x D-Sub, 1 x HDMI, 1 x LAN (RJ45) port(s), 2 x USB 2.0,3 x Audio jack(s)
Internal I/O Ports	1 x COM port header, 1 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s) (19-pin), 1 x CPU Fan connector(s) (1 x 4-pin), 2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s), 1 x M.2 Socket 3 with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode), 1 x SPI TPM header, 1 x COM port(s) connector(s), 4 x SATA 6Gb/s connector(s), 1 x S/PDIF out header(s), 1 x 24-pin EATX Power connector(s), 1 x 8-pin ATX 12V Power connector(s), 1 x Front panel audio connector(s) (AAFP), 1 x System panel(s), 1 x Clear CMOS jumper(s), 1 x COM port header, 1 x Speaker connector, 1 x Chassis Fan connector(s) (1 x 4-pin)
Accessories	2 x SATA 6Gb/s cable(s), User's manual, I/O Shield, 1 x M.2 Anchor, 1 x Supporting DVD, 2 x SATA 6Gb/s cable(s)
BIOS	256 Mb Flash ROM, UEFI AMI BIOS
Operating System	Windows 7 64-bit *, Windows 10 64-bit
Form Factor	mATX Form Factor, 8.9 inch x 8.7 inch ( 22.6 cm x 22.1 cm )
Note	*To support Windows 7 64-bit, please install an AMD Ryzen 2nd Generation or Ryzen 1st Generation Processor.

FAQ

Is the Asus PRIME B450M-K II compatible with Ryzen 5000 series processors?

Yes, the Asus PRIME B450M-K II motherboard supports AMD Ryzen 5000 series processors after a BIOS update. Ensure that you have the latest BIOS version installed for compatibility.

Can I install an M.2 NVMe SSD on this motherboard?

Yes, the M.2 slot on the Asus PRIME B450M-K II supports both PCIe 3.0 x4 and SATA modes, allowing you to install an M.2 NVMe SSD for faster storage performance.

Does this motherboard support overclocking?

While the Asus PRIME B450M-K II supports DDR4 memory speeds up to 4400MHz (OC), the extent of overclocking capabilities may be limited compared to higher-end motherboards. It's recommended to check the motherboard's specifications and your CPU's capabilities before attempting overclocking.