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ASUS Prime B550M-K AM4 Micro ATX Motherboard


Out of stock

  • AMD AM4 socket: Ready for Ryzen™ 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


Out of stock

B550 mainboards support all the features of the Ryzen processors of the third and fourth generation, especially the PCI Express standard in version 4.0 (PCIe 4.0). PCIe 4.0 is backward compatible and can be used with all expansion cards from previous generations. In addition, the mainboards support up to 128 GB of RAM with a guaranteed clock speed of 3200 megahertz. With overclocking, much higher clock rates are possible depending on the mainboard. The B550 chipset also enables the processor to be overclocked.

The features of the ASUS Prime B550M-K at a glance:
– 1x PCIe 4.0 x16 (x16)
– 2x USB 3.1 / 6x USB 3.0 / 4x USB 2.0
– 2x M.2 (1x PCIe 4.0 x4 and SATA 6G / 1x PCIe 3.0 x4 and SATA 6G) / 4x SATA 6G
– DDR4 memory up to 4800 MHz using OC
– Ready for AMD Ryzen 3000 processors

The features of the ASUS Prime B550M-K in detail:
The ASUS Prime B550M-K is a micro ATX motherboard and has a PCI Express 4.0 slot with full x16 connection for graphics cards. The motherboard provides two PCIe 3.0 x1 slots for additional expansion cards. The four RAM banks support up to 128 GB DDR4 RAM with a clock rate of up to 3200 megahertz and can even handle clock rates up to 4800 MHz via OC.

The AM4 mainboard provides two M.2 slots. One slot is connected to the processor with four PCI Express lanes and supports PCIe 4.0 and SATA 6G for drives up to 110 mm in length (22110). The second M.2 slot is connected to the chipset with four PCI Express lanes and supports PCIe 3.0 and SATA 6G for drives up to 80 mm in length (2280). Four SATA 6G connectors are also provided.

Modern connections
The ASUS Prime B550M-K provides two USB 3.1 ports and four USB 3.0 ports with a type A socket on the I / O panel. An HDMI, DVI and VGA connection are available for CPUs with an integrated graphics unit. This B550 motherboard also offers features such as a gigabit LAN port (Realtek RTL8111H) and on-board sound (Realtek ALC887 audio codec). Furthermore, three fans can be connected directly to the board.

SKU: 4718017758284 Categories: , ,

AMD B550
CPU Socket
Back Panel I/O
2 x USB-A (USB 3.2 Gen 2×2)
4 x USB-A (USB 3.0 / 3.1/3.2 Gen 1)
1 x HDMI 2.1
1 x DVI-D
1 x VGA
3 x 1/8″ / 3.5 mm
Ethernet / Controller
1 x Realtek RTL8111H Gigabit
1 x Combo
Memory Slots
4 x 288-Pin
Memory Support
DDR4 2133, 2400, 2666, 2800, 3000, 3200, 3333, 3466, 3600, 3733, 3866, 4000, 4133, 4266, 4400, 4466, 4600, 4800 MHz
Maximum Capacity
128 GB
Channel Architecture
Dual Channel
ECC Support
Non-ECC, ECC Unbuffered
Storage Expansion
1 x M Key 2242, 2260, 2280, 22110 (PCIe 4.0 x4, SATA (Unspecified))
1 x M Key 2242, 2260, 2280 (PCIe 3.0 x4, SATA (Unspecified))
RAID Support
RAID 0, 1, 10
Internal I/O
Expansion Slots
1 x PCIe 4.0 x16
2 x PCIe 3.0 x1
1 x USB 3.1 / USB 3.2 Gen 1 Header (Supports 2 USB Type-A Port)
2 x USB 2.0 Header (Supports 4 USB Type-A Port)
Multi-GPU Support
Air Cooling
1 x 4-Pin CPU
2 x 4-Pin System
Power Connectors
1 x 24-Pin Mainboard
1 x 8-Pin ATX
TPM Module
1 x Speaker
1 x S/PDIF
Clear CMOS
1 x Serial
256 Mb
Front Panel I/O
Front Panel I/O
AAFP, USB 3.0 / 3.1/3.2 Gen 1
Audio Codec
Realtek ALC887 (7.1-Channel)
OS Compatibility
Windows 10
*As of September, 2020: Check with manufacturer for the most up-to-date compatibility
Form Factor
9.61 x 9.61″ / 24.4 x 24.4 cm
Packaging Info
Package Weight
1.93 lb
Box Dimensions (LxWxH)
10.7 x 10.3 x 2.1″