ASUS PRIME B550M-K motherboard AM4, micro-ATX, DDR4, 2 × M.2, HDMI, DVI, VGA
ASUS

ASUS PRIME B550M-K motherboard AM4, micro-ATX, DDR4, 2 × M.2, HDMI, DVI, VGA

The ASUS PRIME B550M-K is a micro-ATX motherboard with the AMD AM4 socket and B550 chipset for DDR4 memory. Two M.2 slots, PCIe 4.0 for the graphics card and three video outputs, HDMI, DVI-D and VGA, make it a good fit for a compact home or office PC.

  • Socket and chipset: AMD AM4, B550; Ryzen 3000 Series
  • Form factor: micro-ATX, 244 × 244 mm
  • Memory: DDR4, 4 DIMM slots, up to 128 GB, 2133–4600 MHz
  • Storage: 2 × M.2, SATA
  • Expansion slots: 1 × PCIe 4.0 x16, 2 × PCIe 3.0 x1
  • Rear panel: HDMI, DVI-D, VGA (D-Sub), PS/2, 4 × USB 3.2 Gen 1, 2 × USB 3.2 Gen 2, 1 GbE (Realtek RTL8111H)

Description

Three video outputs and protection against faults

With a Ryzen processor that has integrated graphics, a monitor connects to HDMI, DVI-D or VGA, so an older display works too. There is no DisplayPort. ASUS 5X Protection III guards the board with several hardware safeguards, the chipset has a heatsink, and fans are controlled from Fan Xpert 2+ software or the UEFI BIOS.

Who this motherboard is for

Anyone putting together a small AM4 PC for the office or home, or upgrading an older AM4 system while keeping the DDR4 memory. Four memory slots on a micro-ATX board leave room to expand later. There is no Wi-Fi; networking goes through the RJ-45 port.

Specifications

General

BrandASUS
BIOS typeUEFI AMI
BIOS memory size256
Number of memory slots4
Motherboard form factormicro ATX
Number of M.2 (M) slots2
PCI Express x1 (Gen 3.x) slots2
PCI Express x16 (Gen 4.x) slots1
EAN4718017758284

Processor

Processor manufacturerAMD
Motherboard chipsetAMD B550
Processor socketSocket AM4
Motherboard chipset familyAMD
Compatible processor seriesAMD Ryzen 3000 Series

Memory

Maximum internal memory128 GB
Memory slots typeDIMM

Storage

Supported storage drive interfacesM.2, SATA

Ports

HDMI ports quantity1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity2
Ethernet LANYes
Ethernet LAN (RJ-45) ports1
LAN controllerRealtek RTL8111H
USB 2.0 connectors2
PS/2 ports quantity1
DVI-D ports quantity1
ATX Power connector (24-pin)Yes
USB 3.2 Gen 1 (3.1 Gen 1) connectors1

Connectivity

Wi-FiNo

Software & security

Windows operating systems supportedWindows 10

Performance & capacities

Supported memory clock speeds2133/2400/2666/2800/3000/3200/3333/3466/3600/3733/3866/4000/4133/4266/4400/4600

Features

Supported memory typesDDR4-SDRAM

Dimensions & weight

Width244 mm
Depth244 mm
Height51 mm
Weight785 g

Questions & answers

How many SATA drives can I connect?

The manufacturer does not specify the number of SATA ports. The data list SATA support and two M.2 slots for SSDs.

Does the board have Wi-Fi?

No. Networking runs through the RJ-45 port on a Realtek RTL8111H controller at up to 1 Gbit/s.

Which processors does the board support?

The board has an AMD AM4 socket, and the manufacturer lists the Ryzen 3000 Series as compatible. The video outputs only work with a processor that has integrated graphics.