ASUS PRIME B840M-K Micro ATX Motherboard

ASUS PRIME B840M-K | AMD B840 Micro ATX Motherboard

The ASUS PRIME B840M-K AMD B840 Socket AM5 micro ATX motherboard delivers robust performance for AMD Ryzen 7000/8000/9000 series processors in a compact micro ATX form factor. Designed with the DIY builder in mind, this board offers essential features including dual-channel DDR5 memory support up to 128 GB, PCIe 4.0 expansion, and 2.5 Gb Ethernet connectivity.

Key Specifications

Built for Ryzen Performance

The ASUS PRIME B840M-K leverages the AMD B840 chipset to provide stable performance for modern Ryzen processors. With support for AMD Ryzen 7000, 8000, and 9000 series CPUs, this motherboard offers the foundation needed for everything from everyday computing to more demanding applications. The dual-channel DDR5 architecture ensures responsive memory performance, while the PCIe 4.0 slot provides high-bandwidth connectivity for the latest graphics cards.

Storage Flexibility and Expansion

Storage options abound with the ASUS PRIME B840M-K. The board features two M.2 slots supporting the latest NVMe SSDs for lightning-fast storage speeds, plus four SATA III ports for traditional hard drives and SSDs. This configuration allows for up to six storage drives total, giving you flexibility for your storage needs. Whether you’re building a gaming rig, workstation, or content creation system, the storage configuration adapts to your requirements.

Connectivity and I/O Features

Connectivity options include four USB 3.2 Gen 1 Type-A ports and two USB 2.0 ports for peripherals, plus a front panel audio header for high-quality sound output. The 7.1 channel audio support delivers immersive sound for gaming and media. A dedicated HDMI port provides straightforward video output, while the 2.5 Gb Ethernet port ensures reliable, fast network connectivity for online gaming, streaming, and large file transfers.

Advanced Cooling and Power Delivery

The ASUS PRIME B840M-K includes comprehensive cooling support with three chassis fan headers and dedicated CPU fan connector. The EPS 8-pin and ATX 24-pin power connectors ensure stable power delivery to your system. These features work together to maintain optimal temperatures during extended use, protecting your investment and ensuring consistent performance whether you’re gaming, working, or creating content.

Box Contents

• ASUS PRIME B840M-K motherboard
• SATA cables (quantity not specified)
• Screws (quantity not specified)

Check before you buy

• Confirm your AMD Ryzen processor is compatible with Socket AM5
• Verify your case supports micro ATX motherboard dimensions (244 x 221 mm)
• Check if your power supply has the required 24-pin ATX and 8-pin EPS connectors
• Ensure you have DDR5 memory modules (not DDR4)

Frequently Asked Questions

Q: What processors are compatible with this motherboard?

A: The ASUS PRIME B840M-K supports AMD Ryzen 7000, 8000, and 9000 series processors using the AM5 socket.

Q: Does this motherboard support Wi-Fi?

A: No, this motherboard does not include built-in Wi-Fi. It features 2.5 Gb Ethernet for wired network connectivity.

Q: How many M.2 slots does it have?

A: The motherboard includes 2 M.2 slots for NVMe SSDs.

Q: What is the maximum RAM capacity?

A: The ASUS PRIME B840M-K supports up to 128 GB of DDR5 memory across its 2 DIMM slots.

Q: Does it support RGB lighting?

A: Yes, the motherboard includes 3 RGB LED pin headers for connecting compatible RGB lighting components.

The Consultant’s verdict & warranty

The ASUS PRIME B840M-K AMD B840 Socket AM5 micro ATX motherboard offers excellent value for builders seeking a reliable foundation for AMD Ryzen systems. With its combination of modern features including DDR5 support, PCIe 4.0, and comprehensive storage options in a space-efficient micro ATX package, it suits both first-time builders and experienced enthusiasts. Covered by the standard Manufacturer Warranty.