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.

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.

Specification

Product
Product id	684745
Brand	AsusTek
Partnr	90MB14V0-M0EAY0
EAN/UPC code	4718017758284
Warranty (months)	36 months
Processor
Processor manufacturer	AMD
Processor socket	Socket AM4
Compatible processor series	AMD Ryzen 3 3rd Gen, AMD Ryzen 5 3rd Gen, AMD Ryzen 7 3rd Gen, AMD Ryzen 9 3rd Gen
Memory
Supported memory types	DDR4-SDRAM
Number of memory slots	4
Memory slots type	DIMM
Supported memory clock speeds	2133, 2400, 2666, 2800, 3000, 3200, 3333, 3466, 3600, 3733, 3866, 4000, 4133, 4266, 4400, 4600 MHz
Maximum internal memory	128 GB
Storage controllers
Supported storage drive interfaces	M.2, SATA
Internal I/O
USB 2.0 connectors	2
USB 3.2 Gen 1 (3.1 Gen 1) connectors	1
ATX Power connector (24-pin)	Y
Rear panel I/O ports
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity	2
Ethernet LAN (RJ-45) ports	1
PS/2 ports quantity	1
HDMI ports quantity	1
DVI-D ports quantity	1
Network
Ethernet LAN	Y
LAN controller	Realtek RTL8111H
Wi-Fi	N
Features
Motherboard form factor	Micro ATX
Motherboard chipset family	AMD
Motherboard chipset	AMD B550
Windows operating systems supported	Windows 10
Expansion slots
PCI Express x1 (Gen 3. x) slots	2
PCI Express x16 (Gen 4. x) slots	1
Number of M.2 (M) slots	2
BIOS
BIOS type	UEFI AMI
BIOS memory size	256 Mbit