ASUS PRIME B550M-K Micro ATX Motherboard

• AMD AM4 socket: Ready for Ryzenâ„¢ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors

• Comprehensive cooling: PCH heatsink and Fan Xpert 2+

• Ultrafast connectivity: Dual M.2, PCIe 4.0, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A

• 5X Protection III: Multiple hardware safeguards for all-around system protection

ASUS PRIME B550M-K Micro ATX Motherboard

AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, 1 Gb Ethernet, HDMI/D-Sub/DVI, SATA 6 Gbps, USB 3.2 Gen 2 Type-A

Prime

ASUS Prime series is expertly engineered to unleash the full potential of 3rd Generation AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features.

Tune It Your Way

Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.

Cooler by Design

Prime B550M-K is engineered with an array of hybrid fan headers and features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS, ensuring your rig stays cool and stable under intense workloads.

Build on a Solid Foundation

Prime B550 motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options.

PCIe 4.0 M.2

(up to 64 Gbps)

Achieve speed with onboard M.2

PCIe 4.0 M.2 Slot supports up to 22110 and provide NVMe SSD RAID support for an incredible performance boost. Create a RAID configuration with up to PCIe 4.0 storage device to enjoy the fastest data-transfer speeds on the 3rd Generation AMD Ryzen platform.

Little Things Make a Big Difference

Prime B550 series adds the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive interface that let you customize your system to create a uniquely personal look.

Outstanding Audio

Combined onboard features deliver elevated audio

Intelligent design and premium hardware create audio quality unlike anything you've ever experienced.

Audio Shielding

Separates analog/digital signal domains, significantly reducing multi-lateral interference. 

Separate Layer for Left and Right Tracks

Ensures minimal crosstalk between audio paths.

Premium Japanese Capacitors

Premium parts provide an immersive sound signature, with exceptional fidelity.

Specifications

CPU

• AMD AM4 Socket for AMD Ryzenâ„¢ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors *

Chipset

• AMD B550

Memory

• 4 x DIMM, Max. 128GB, DDR4 4866(O.C)/4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4333(O.C.)/4266(O.C.)/4200(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3400(O.C.)/3333(O.C.)/3200/3000/2933/2800/2666/2400/2133 MHz Un-buffered Memory *
• Dual Channel Memory Architecture
• ECC Memory (ECC mode) support varies by CPU.

Graphic

• 1  x D-Sub
• 1  x DVI-D
• 1  x HDMI 2.1(4K@60HZ)

Expansion Slots

• AMD Ryzenâ„¢ 5000 Series/ 3000 Series Desktop Processors
• 1 x PCIe 4.0 x16 (x16 mode)
• AMD Ryzenâ„¢ 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

Storage

• Total supports 2 x M.2 slot(s) and 4 x SATA 6Gb/s ports
• AMD Ryzenâ„¢ 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 Ryzenâ„¢ 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

LAN

• Realtek RTL8111H 1Gb Ethernet
• ASUS LANGuard

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.

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)
• 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

• 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

• 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)

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

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)

BIOS

• 256 Mb Flash ROM, UEFI AMI BIOS

Manageability

• WOL by PME, PXE

Operating System

• Windows® 10 64-bit

Form Factor

• mATX Form Factor
• 9.6  inch x 9.6  inch ( 24.4  cm x 24.4  cm )