For 3rd & 5th gen Ryzen CPUs only
Not compatible with Ryzen 5 3400G & Ryzen 3 3200G
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
AMD AM4 socket: Ready for 3rd Gen AMD Ryzen™ 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 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.
Combined onboard features deliver elevated audio
Intelligent design and premium hardware create audio quality unlike anything you've ever experienced.
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 exception
DDR4 (Dual Channel)
4 x DIMM
3rd Gen AMD Ryzen CPUs:
Next Gen AMD Ryzen PRO CPUs:
Integrated Graphics Processor*
Graphics specifications may vary between CPU types
1 x VGA
1 x DVI-D
1 x HDMI
1 x PCIe 4.0 x16 (x16 mode)
2 x PCIe 3.0 x1
4 x SATA III
1 x M.2 (2242/2260/2280/22110) - SATA & PCIe
1 x M.2 (2242/2260/2280) - SATA & PCIe
RAID 0, 1, 10
Realtek ALC887 7.1 Surround Sound High Definition Audio CODEC
USB Ports Supported
2 x USB 3.2 Gen2 Type-A (at back)
6 x USB 3.2 Gen1 (4 at back, 2 at mid-board)
4 x USB 2.0 (mid-board)
Back Panel I/O Ports
1 x PS/2 keyboard/mouse
1 x DVI-D
1 x D-Sub
1 x HDMI
1 x LAN (RJ45)
2 x USB 3.2 Gen2 Type-A
4 x USB 3.2 Gen1 Type-A
3 x Audio jacks
Internal I/O Connectors
1 x CPU Fan
2 x Chassis Fan
1 x USB 3.2 Gen1
2 x USB 2.0
2 x M.2 Socket 3 with M key
1 x SPI TPM
4 x SATA 6Gb/s
1 x S/PDIF out
1 x 24-pin EATX
1 x 8-pin EATX 12V
1 x Front audio
1 x Clear CMOS jumper
1 x System panel
1 x COM port
1 x Speaker
2 x SATA 6Gb/s cables
1 x Supporting DVD
1 x M.2 SSD screw package
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