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Green micro-ATX board with silver heatsinks and RGB accents

ASUS

ASUS PRIME B550M-K ARGB AMD motherboard

SKU CH-NTGS-30HKA

Micro-ATX AMD B550 board with dual M.2 slots, PCIe 4.0, DisplayPort, HDMI and Aura Sync RGB lighting

  • Supports Ryzen 5000 and 3000 series CPUs with AM4 socket
  • Dual M.2 slots and PCIe 4.0 x16 for high-speed storage and graphics
  • Up to 64 GB DDR4 memory at speeds up to 5100 MHz
  • 4K 60 Hz output via DisplayPort 1.4 and HDMI 2.1
  • Aura Sync addressable RGB headers with comprehensive Fan Xpert 2+ cooling control

Compact AM4 mATX board

The ASUS PRIME B550M-K ARGB is a micro-ATX motherboard built on the AMD B550 chipset for Socket AM4 processors. It provides two DDR4 DIMM slots supporting speeds up to 5100 (OC) and a maximum capacity of 64 GB. Dual M.2 slots and a PCIe 4.0 x16 slot deliver high-speed storage and graphics connectivity. Rear video outputs include DisplayPort 1.4 and HDMI 2.1 for integrated graphics use.

Suited for Ryzen 5000/4000G/3000 builds

This board fits builders assembling a compact system around Ryzen 5000 Series, 5000 G-Series, 4000 G-Series or 3000 Series desktop CPUs. The single PCIe 4.0 x16 slot and two M.2 sockets cover a discrete GPU plus fast storage. Users who require four memory slots, additional PCIe expansion or onboard wireless networking will need a different model.

Two DIMM slots limit memory to 64 GB

The defining specification is the two DDR4 DIMM slots capped at 64 GB total capacity. If the planned build needs more than 64 GB of RAM or four-module kits for higher bandwidth, this motherboard cannot accommodate it. Buyers satisfied with 64 GB in two modules can proceed; others should select a board with four slots.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $116.99
Cheaper than about 71% of the 1,906 comparable items (median $224.49).

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Specifications

No published specifications for this item yet.

Questions about this item

What PCIe standard does the primary x16 slot use and what bandwidth ceiling does that impose on a graphics card?

The primary slot is PCIe 4.0 x16, so a graphics card is limited to PCIe 4.0 signalling rates.

What form factor and mounting pattern does the board use for a standard chassis?

The board follows the micro-ATX form factor with standard mATX mounting holes.

How is the addressable RGB header connected in Aura Sync software, and which step is commonly missed?

Connect a 5 V 3-pin ARGB strip to the onboard Addressable Gen 2 header, then enable the header in the Aura Sync application; the step often missed is selecting the correct header in software after the physical connection.

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