Model

PRIME B550M-K

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CPU

AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors *

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Chipset

AMD B550

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Memory

4 x DIMM, Max. 128GB, DDR4 4866MHz Un-buffered Memory *

Dual Channel Memory Architecture

ECC Memory (ECC mode) support varies by CPU.

* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.

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Graphic

1  x D-Sub

1  x DVI-D

1  x HDMI 2.1(4K@60HZ)

*Graphics specifications may vary between CPU types.

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Expansion Slots

AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors


1 x PCIe 4.0 x16 (x16 mode)


AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors


1 x PCIe 3.0 x16 (x16 mode)


AMD B550 Chipset


2 x PCIe 3.0 x1

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Storage

Total supports 2 x M.2 slot(s) and 4 x SATA 6Gb/s ports



AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors :


1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280/22110(PCIE 4.0 x4 and SATA modes) storage devices support


AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors :


1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280/22110(PCIE 3.0 x4 and SATA modes) storage devices support


AMD B550 Chipset :


1 x M.2_2 socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support

4 x SATA 6Gb/s port(s),

Support Raid 0, 1, 10

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LAN

Realtek RTL8111H 1Gb Ethernet

ASUS LANGuard

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Audio

Realtek ALC887/897 7.1 Surround Sound High Definition Audio CODEC *

– Supports : Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192kHz playback


Audio Feature :


– LED-illuminated design

– Audio Shielding

– Dedicated audio PCB layers

– Premium Japanese audio capacitors

* Choose the chassis with HD audio module in front panel to support 8-channel audio output.

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USB Ports

Rear USB Port

( Total 6  )

2 x USB 3.2 Gen 2 port(s)(2 x Type-A)

4 x USB 3.2 Gen 1 port(s)(4 x Type-A)


Front USB Port

( Total 6  )

2 x USB 3.2 Gen 1 port(s)(2 x Type-A)

4 x USB 2.0 port(s)(4 x Type-A)

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Software Features

ASUS Exclusive Software

Armoury Crate

AI Suite 3

– Performance And Power Saving Utility

TurboV EVO

EPU

Digi+ VRM

Fan Xpert 2+

– EZ update

ASUS CPU-Z

AI Charger

DAEMON Tools

Norton Anti-virus software (Free Trial for 60 days)

WinRAR

UEFI BIOS

ASUS EZ DIY

– ASUS CrashFree BIOS 3

– ASUS EZ Flash 3

– ASUS UEFI BIOS EZ Mode

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ASUS Special Features

ASUS 5X PROTECTION III

– ASUS DIGI+ VRM

– ASUS LANGuard

– ASUS Overvoltage Protection

– ASUS SafeSlot Core

– ASUS Stainless-Steel Back I/O

ASUS Q-Design

– ASUS Q-DIMM

– ASUS Q-Slot

ASUS Thermal Solution

– Aluminum heatsink design

ASUS Lighting Control

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Back I/O Ports

1 x PS/2 keyboard/mouse combo port(s)

1 x DVI-D

1 x D-Sub

1 x HDMI

1 x LAN (RJ45) port(s)

2 x USB 3.2 Gen 2 (teal blue) (2 x Type-A)

4 x USB 3.2 Gen 1 (blue) Type-A

3 x Audio jack(s)

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Internal I/O Ports

1 x CPU Fan connector(s)

2 x Chassis Fan connector(s)

1 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s)

2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)

1 x M.2 Socket 3 with M Key, type 2242/2260/2280/22110 storage devices support (SATA mode & X4 PCIE mode)

1 x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode)

1 x SPI TPM header

4 x SATA 6Gb/s connector(s)

1 x S/PDIF out header(s)

1 x 24-pin EATX Power connector(s)

1 x 8-pin EATX 12V Power connectors

1 x Front panel audio connector(s) (AAFP)

1 x Clear CMOS jumper(s)

1 x System panel connector

1 x COM port header

1 x Speaker connector

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Accessories

User´s manual

I/O Shield

2 x SATA 6Gb/s cable(s)

1 x Supporting DVD

1 x M.2 SSD screw package(s)

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BIOS

256 Mb Flash ROM, UEFI AMI BIOS

Manageability

WOL by PME, PXE

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Operating System

Windows® 10 64-bit

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Form Factor

mATX Form Factor

9.6  inch x 9.6  inch ( 24.4  cm x 24.4  cm )