ASUS PRIME B550M-K micro ATX Motherboard

ASUS PRIME B550M-K ARGB | Compact AMD B550 micro ATX motherboard

The ASUS PRIME B550M-K ARGB AMD B550 Socket AM4 micro ATX delivers a compact micro ATX form factor with robust AMD B550 chipset support, making it ideal for small-form-factor builds that demand PCIe 4.0 storage speeds and flexible memory tuning for AMD Ryzen 5000/4000/3000 series processors.

Slim Specs Table

Built for Ryzen Performance

This motherboard is engineered to unlock the full potential of AMD Ryzen 5000, 5000 G-Series, 4000 G-Series, and 3000 Series processors. The AMD B550 chipset provides PCIe 4.0 support for one M.2 slot, enabling storage speeds up to 64 Gbps for faster boot times and application loading. With dual-channel DDR4 memory support up to 5100 MHz, you can pair high-speed RAM for responsive multitasking and gaming.

Smart Power and Cooling Design

The PRIME B550M-K ARGB includes an Energy Processing Unit (EPU) that automatically optimises power consumption across the system, helping reduce energy use without compromising performance. Cooling is handled through hybrid fan headers configurable via Fan Xpert 2+ software or UEFI BIOS, with support for dynamic temperature referencing from up to three thermal sensors. This ensures stable operation under heavy workloads.

Compact Yet Expandable

Despite its micro ATX footprint, this board offers strong expansion options: one PCIe 4.0 x16 slot for the latest GPUs, one PCIe 3.0 x1 slot for add-in cards, and dual M.2 slots for high-speed storage. Four SATA III ports support additional HDDs or SSDs, and the inclusion of a 7.1-channel audio output plus HDMI 2.1 and DisplayPort 1.4 covers most modern display and audio needs.

Customisable ARGB Lighting

Integrated RGB LED headers allow synchronisation with compatible ASUS ARGB devices, giving you control over system lighting through Armoury Crate software. This lets you personalise the look of your build while maintaining a clean, compact layout suitable for smaller cases.

Box contents

• ASUS PRIME B550M-K ARGB motherboard
• SATA cable(s)
• User manual and support DVD

Check before you buy

• Confirm your CPU is compatible with Socket AM4 (BIOS update may be required for newer Ryzen 5000 series).
• Verify your case supports micro ATX motherboards (244 mm x 221 mm).
• Ensure your PSU has a 24-pin ATX and 8-pin EPS connector for full compatibility.
• Check that your M.2 SSDs are compatible with PCIe 4.0 if using the top slot.

Frequently Asked Questions

Q: Does this motherboard support Windows 11?

A: Yes, it supports Windows 10 x64 and Windows 11.

Q: Can I use DDR4 RAM faster than 3200 MHz?

A: Yes, it supports DDR4 up to 5100 MHz, subject to CPU and memory compatibility.

Q: How many M.2 drives can I install?

A: Two M.2 slots are available, one with PCIe 4.0 support.

Q: Is there built-in Wi-Fi?

A: No, this model does not include integrated Wi-Fi; use Ethernet or a Wi-Fi adapter.

Q: What RGB control software is included?

A: ASUS Armoury Crate provides ARGB lighting control and system tuning.

The Consultant’s verdict & warranty

The ASUS PRIME B550M-K ARGB is a well-rounded micro ATX motherboard for compact AMD Ryzen systems, offering PCIe 4.0 storage, flexible memory support, and ARGB customisation in a space-saving design. It suits builders seeking performance without sacrificing expandability. Covered by the standard Manufacturer Warranty.