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ASUS PRIME B550M-K WIFI Micro-ATX Motherboard, AMD AM4, DDR4, Dual M.2, Wi-Fi 6, Gigabit LAN

Brand:
ASUS
ASUS PRIME B550M-K WIFI Micro-ATX Motherboard
ASUS PRIME B550M-K WIFI Micro-ATX Motherboard, AMD AM4, DDR4, Dual M.2, Wi-Fi 6, Gigabit LAN
€152.64 inc. VAT
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90MB1R80-M0EAY0
€128.27 €142.52
€152.64 inc. VAT
Ships from EU stock: 9 item(s)
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Product Code
04:596614
EAN Code
4711636611367
Manufacturer
ASUS
Features
Bluetooth, Wireless

Quick Specs

Platform
AMD AM4 / B550
Memory
2 × DDR4 / up to 64GB
Storage
2 × M.2 + 4 × SATA
Network
Wi-Fi 6 + 1Gb Ethernet
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ASUS PRIME B550M-K WIFI Micro-ATX Motherboard, AMD AM4, DDR4, Dual M.2, Wi-Fi 6, Gigabit LAN

AMD AM4 / B5502 × DDR4 / up to 64GB2 × M.2 + 4 × SATA

PRIME B550M-K WIFI is a compact AM4 motherboard for a compatible Ryzen build with DDR4 memory. It provides two M.2 slots, four SATA connections and both Wi-Fi 6 and Gigabit Ethernet, so you can plan storage and networking without adding a wireless card. Its two DIMM slots support up to 64GB. Choose the processor carefully: the main graphics slot and first M.2 slot operate at PCIe 4.0 with Ryzen 5000/3000 processors, or PCIe 3.0 with 5000 G/4000 G processors.

Compatibility — check before buying:
Requires an exact supported AM4 CPU and DDR4 memory; CPU, RAM and drives are separate.

Key Features

 
AM4 and DDR4 in a compact board
The 24.4 × 22.1cm micro-ATX board has two DDR4 slots. Check the exact Ryzen CPU and BIOS support before building.
 
Two storage paths for different drives
M.2_1 supports 2280 drives with CPU-dependent PCIe 4.0/3.0 x4 and SATA modes. M.2_2 supports PCIe 3.0 x4 or SATA drives up to 22110; four separate SATA connectors are also available.
 
Wireless and wired networking supplied
Wi-Fi 6 uses the 2.4GHz and 5GHz bands; a moving antenna is included. Realtek Gigabit LAN provides the wired alternative.
 
Straightforward setup and cooling controls
Q-LED Core assists POST troubleshooting. Fan Xpert 2+ and UEFI control the CPU and two chassis fan headers; three addressable RGB headers support Aura Sync.

Technical Specifications

Identification
Brand / model ASUS PRIME B550M-K WIFI
Retail part number 90MB1R80-M0EAY0
EAN / GTIN 4711636611367
Socket / chipset AM4 / AMD B550
Form factor / dimensions Micro-ATX, 24.4 × 22.1cm
CPU and memory
Processor support AMD Ryzen 5000 / 5000 G / 4000 G / 3000 Series; verify exact CPU support list and BIOS
Memory slots / maximum 2 × DDR4 DIMM, up to 64GB, dual channel, unbuffered
Supported memory data rates 5100(OC) / 4866(OC) / 4600(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3400(OC) / 3333(OC) / 3200 / 3000 / 2933 / 2800 / 2666 / 2400 / 2133MT / s
Memory conditions ECC mode depends on CPU; rates and module support depend on CPU and memory configuration; check memory QVL
Expansion and storage
Main PCIe slot 1 × x16: PCIe 4.0 x16 with Ryzen 5000/3000; PCIe 3.0 x16 with 5000 G/4000 G
Additional PCIe slot 1 × PCIe 3.0 x1
M.2_1 Key M, 2280; PCIe 4.0 x4 / SATA with Ryzen 5000/3000; PCIe 3.0 x4 / SATA with 5000 G/4000 G
M.2_2 Key M, 2242/2260/2280/22110; PCIe 3.0 x4 and SATA
SATA 4 × SATA 6Gb/s
RAID AMD RAIDXpert2: PCIe and SATA RAID 0/1/10
Connectivity and audio
Ethernet Realtek 1Gb Ethernet, ASUS LANGuard
Wi-Fi 1×1 Wi-Fi 6 (802.11ax), 2.4/5GHz
Bluetooth Supported; version varies by wireless module
Display outputs 1 × DisplayPort 1.4, 1 × HDMI 2.1, each up to 4K 60Hz; requires CPU with integrated graphics
Rear USB 4 × USB 5Gbps Type-A, 2 × USB 2.0 Type-A
Front USB headers 1 × USB 5Gbps header for 2 ports; 2 × USB 2.0 headers for 4 ports
Other rear I/O 1 × RJ-45, 3 × audio jacks, 1 × PS/2 keyboard/mouse combo, Wi-Fi module
Audio Realtek 7.1 HD audio; up to 24-bit/192kHz; jack detection, multi-streaming and front-panel jack retasking; 7.1 requires chassis front HD-audio module
Audio construction Audio shielding, premium capacitors, dedicated audio PCB layers
Internal connectors and features
Fan headers 1 × 4-pin CPU, 2 × 4-pin chassis; Fan Xpert 2+ and UEFI fan control
Power connectors 1 × 24-pin main, 1 × 8-pin +12V CPU
Lighting headers 3 × Addressable RGB Gen 2, Aura Sync
Other internal headers 1 each: Clear CMOS, COM, front audio (F_AUDIO), S/PDIF out, SPI TPM (14-1 pin), front system panel (10-1 pin)
Protection and DIY DIGI+ VRM, LANGuard, overvoltage protection, SafeSlot Core, stainless-steel rear I/O; Q-DIMM, Q-Slot, Q-LED Core; aluminium heatsink
SafeSlot Core reference ASUS cites 1.6× stronger retention and 1.3× greater shearing resistance versus standard expansion slots
BIOS 16MB (128Mb) flash ROM, AMI UEFI; CrashFree BIOS 3, EZ Flash 3, EZ Mode
Manageability WOL by PME, PXE
Software Armoury Crate, Aura Creator / Sync, Fan Xpert 2+, DriverHub, ASUS CPU-Z, GlideX
Operating systems Windows 11, Windows 10 64-bit
Package
Included accessories 2 × SATA cables, ASUS Wi-Fi moving antenna, I/O shield, M.2 anchor package, quick start guide

What's in the Box

PRIME B550M-K WIFI motherboard
2 × SATA 6Gb/s cables
ASUS Wi-Fi moving antenna
I/O shield and M.2 anchor package
Quick start guide

What Will Not Work

Requires an exact supported AM4 CPU and DDR4 memory; CPU, RAM and drives are separate.
Rear display outputs need CPU integrated graphics.
PCIe 4.0 is CPU-dependent; M.2_2 is PCIe 3.0.

Frequently Asked Questions

Is this the same as the non-Wi-Fi B550M-K?
No. This exact WIFI model has two DIMM slots, Wi-Fi 6 and DisplayPort/HDMI outputs. Use its own specifications and support list rather than those of the older non-Wi-Fi board.
Can I connect a monitor to the board with any Ryzen CPU?
The rear DisplayPort and HDMI require a processor with integrated graphics. With a CPU without integrated graphics, use a separate graphics card.
Do both M.2 slots offer PCIe 4.0?
No. Only M.2_1 can operate at PCIe 4.0 x4 with a supported Ryzen 5000/3000 processor. M.2_2 operates at PCIe 3.0 x4.
Singular Expert Insight
Choose this board for an AM4 DDR4 build that needs built-in Wi-Fi and two M.2 connections. Its two memory slots are the main expansion trade-off; compare a four-slot board if future RAM additions matter. Check your upgrade with Singular Tell us your equipment model and we can check the compatibility requirements.

Buyer’s Guide

Buy it if

You have a supported AM4 Ryzen CPU and want micro-ATX with Wi-Fi 6.

Skip it if

You need AM5, DDR5, four DIMM slots or faster-than-Gigabit wired networking.

Also consider

An AM4 board with four DIMM slots for more flexible memory expansion.

Features - ASUS - 90MB1R80-M0EAY0

CPU Socket
  • Socket AM4
Interface
  • USB3.2,
  • USB2.0,
  • M.2,
  • SATA,
  • Ethernet,
  • Bluetooth,
  • WIFI
Port Speed
  • 1 Gbps
More Details
Product Code
04:596614
EAN Code
4711636611367
Manufacturer
ASUS
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