ASUS PRIME B550M-K motherboard is designed to support the latest AMD AM4 Ryzen 3rd Gen processors with DDR4 memory up to 128GB with Dual Channel Architecture.
The board supports ultra-fast connectivity with on-boarded dual M.2 slots, USB 3.2 Gen2 and Gen1. The ASUS over-voltage protection protects the board from unexpected current spikes and surges.
The B550M-K board pairs third-generation AMD Ryzen processors with high PCIe 4.0 memory bandwidth through the B550 chipset for maximum performance. It is bundled with latest technologies like Realtek ALC887 7.1 and Aura Sync RGB headers.
Equipped with Realtek RTL8111H 1GB Ethernet port for high-speed network connections with compatible devices. The UEFI BIOS packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work and maximizing your productivity.

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PRIME B550M-K

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.

Cooling

The board comes with an optimized cooling setup. It features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS.

VRM Heatsink

A VRM heatsink with underneath thermal pad improves heat transfer from the MOSFETs and chokes for better cooling performance.

SafeSlot Core

Featuring a fortified design that's anchored to the motherboard by a special hook, SafeSlot Core provides 1.6x stronger retention and 1.3x greater shearing resistance.

PCIe 4.0 Ready

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

Overvoltage Protection

An exclusive circuit design with built-in voltage regulators to protect your motherboard from damage caused by unexpected high-level voltages from unstable or inferior power supplies.

USB 3.2 Gen 2

Numerous USB ports support high-end rigs loaded with peripherals, including two rear-panel USB Type-A connectors with fast USB 3.2 Gen 2 connectivity for compatible cases.

Digi+ VRM Control

The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It also allows you to fine-tune your CPU for ultimate stability and performance.

UEFI BIOS

The renowned ASUS UEFI BIOS provides everything you need to configure, tweak and tune your system. It offers intelligently simplified options for PC DIY beginners, as well as comprehensive features for seasoned veterans. An intuitive Advanced mode offered via the UEFI lets you take complete control.

Fan Xpert 2+

Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS.

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Model	PRIME B550M-K
CPU Socket	AMD AM4 Socket
CPU Support	AMD AM4 Socket 3rd Gen AMD Ryzen Processors
Chipset	AMD B550
Memory	3rd Gen AMD Ryzen Processors 4 x DIMM, Max. 128GB, DDR4 4600(O.C)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory Next Generation AMD Ryzen PRO Processors 4 x DIMM, Max. 128GB, DDR4 4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory Dual Channel Memory Architecture ECC Memory (ECC mode) support varies by CPU.
On-Board Graphics support	1 x D-Sub 1 x DVI-D 1 x HDMI 2.1(4K@60HZ)
Expansion Slot	3rd Gen AMD Ryzen Processors 1 x PCIe 4.0 x16 (x16 mode) AMD B550 Chipset 2 x PCIe 3.0 x1
LAN	Realtek RTL8111H 1Gb Ethernet
Storage	Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports 3rd Gen AMD Ryzen Processors : 1 x M.2 Socket 3, with M Key, Type 2242/2260/2280/22110(PCIE 4.0 x4 and SATA modes) storage devices support AMD B550 Chipset : 1 x M.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
Audio	Realtek ALC887 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
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)
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)
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 & PCIe 4.0 x4 mode) 1 x M.2 Socket 3 with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 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)
Dimensions	24.4 cm x 24.4 cm (9.6 x 9.6 inch ) mATX Form Factor
Warranty	3 Years of Brand Warranty