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Deal.ai › ASUS
ASUS
ASUS PRIME B550M-K AMD B550 Socket AM4 micro ATX

ASUS PRIME B550M-K AMD B550 Socket AM4 micro ATX

Best price now

$131.00at abcsarahshop.comChecked Nov 10

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Price facts

  • Last seen at $131.00 at abcsarahshop.com on Nov 10.

Our take on the ASUS PRIME B550M-K AMD B550 Socket AM4 micro ATX

The ASUS Prime B550M-K is a micro ATX motherboard for AMD Socket AM4 processors, built as a no-frills foundation for a Ryzen desktop. It covers the basics well: a B550 chipset with PCIe 4.0 support, hybrid fan headers with Fan Xpert 2+ control, and onboard audio with dedicated codecs. It suits budget and everyday builders who want a stable board without paying for Wi-Fi, RGB zones or heavy power delivery. Against pricier B550 boards it gives up M.2 heatsinks, wireless and premium VRMs, but it handles mainstream Ryzen chips and single-GPU builds without fuss.

Best forBudget Ryzen desktop buildsMicro ATX cases and compact systemsOffice and everyday PCsFirst-time DIY builders
Pros
  • B550 chipset with PCIe 4.0 support
  • Micro ATX size fits smaller cases
  • Hybrid fan headers with Fan Xpert 2+ and BIOS control
  • Solid onboard audio codecs
  • Simple, stable platform for mainstream Ryzen CPUs
Cons
  • No built-in Wi-Fi or Bluetooth
  • Basic power delivery, not aimed at high-end overclocking
  • Fewer M.2 slots and no M.2 heatsink
  • Limited RGB and premium features versus pricier boards

ASUS PRIME B550M-K AMD B550 Socket AM4 micro ATX prices at every store

  • abcsarahshop.comNew

    In stockShips from the UK · duties may applyReturn policy

    $131.00Checked Nov 10
    Visit abcsarahshop.com

What reviewers say

Owners generally treat the Prime B550M-K as a dependable budget board that boots reliably and is easy to set up. Praise centers on stability and value; criticism focuses on the sparse feature set and modest power delivery.

What people mention
  • StabilityPraisedOwners report the board boots reliably and runs without issues in everyday builds.
  • ValuePraisedBuyers see it as a sensible low-cost base for a Ryzen system.
  • SetupPraisedThe BIOS and layout are described as straightforward for first-time builders.
  • ConnectivityCriticisedReviewers note the lack of Wi-Fi and limited ports compared with pricier boards.
  • Power deliveryMixedThe VRM is fine for mainstream chips but not for serious overclocking.

About the ASUS PRIME B550M-K AMD B550 Socket AM4 micro ATX

The ASUS Prime B550M-K is a micro ATX motherboard with an AMD B550 chipset and an AM4 socket. It supports AMD Ryzen 3000 Series processors. It has four DIMM slots for DDR4 memory, up to 128 GB.

Cooling is handled by hybrid fan headers. Fan settings can be configured in the Fan Xpert 2+ software or in the UEFI BIOS. The board also offers performance tuning options through its software and firmware.

Storage connects through M.2 or SATA, and the board supports RAID. Onboard audio uses exclusive codecs. Network connectivity is Gigabit Ethernet only, with no Wi-Fi.

Chipset
AMD B550
Socket
AMD Socket AM4
Processors
AMD Ryzen 3000 Series
Form factor
micro ATX
Memory
4 x DIMM slots, DDR4-SDRAM, up to 128 GB
Memory speeds
2133, 2400, 2666, 2800, 3000, 3200, 3333, 3466, 3600, 3733, 3866, 4000, 4133, 4266, 4400, 4600 MHz
Storage
M.2 and SATA, up to 6 drives; RAID support
M.2 slots
2
Expansion slots
1 x PCIe 4.0 x16, 2 x PCIe 3.0 x1
Rear ports
4 x USB 3.2 Gen 1 Type-A, 2 x USB 3.2 Gen 2 Type-A, 1 x HDMI, 1 x DVI-D, 1 x RJ-45 Ethernet, 1 x PS/2
Internal connectors
2 x USB 2.0, 1 x USB 3.2 Gen 1, 24-pin ATX power
Networking
Gigabit Ethernet (Realtek RTL8111H); no Wi-Fi
BIOS

Questions and answers

Which CPUs does the Prime B550M-K support?
It uses the AMD AM4 socket and B550 chipset, so it supports Ryzen 3000 and 5000 series desktop processors. Check ASUS's CPU support list for a specific model before buying.
Does it have Wi-Fi?
No. The board has wired Ethernet only, so you need a Wi-Fi card or USB adapter for wireless.
Does it support PCIe 4.0?
Yes. The B550 chipset gives PCIe 4.0 to the main graphics slot and the primary M.2 slot when paired with a compatible Ryzen CPU.
Is it good for overclocking?
It offers basic tuning in the BIOS, but the power delivery is modest. It suits light overclocking on mainstream chips, not high-end overclocking builds.
What form factor is it?
It is micro ATX, so it fits micro ATX and ATX cases but not mini ITX cases.
What comes in the box?
The board, SATA cables, an I/O shield and documentation are typical. Confirm the exact bundle with the seller.
Where is the ASUS PRIME B550M-K AMD B550 Socket AM4 micro ATX cheapest?
At abcsarahshop.com, for $131.00, as of our latest check.

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UEFI AMI, 256 Mbit
OS support
Windows 10
Dimensions
244 mm wide x 244 mm deep x 51 mm high
Weight
785 g
Part number
90MB14V0-M0EAY0
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