Asus PRIME B550M-K (90MB14V0-M0EAY0)
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Asus PRIME B550M-K
Towards:home / office
Form Factor:micro-ATX
Socket:AMD AM4
Chipset:AMD B550
BIOS:Ami
RAM slots:DDR4 4 sl
RAM form factor:DIMM
RAM clock:4400 MHz
Sound (channels):7.1
Connectors:HDMI, M.2
Power connector:24-pin
Processor power:8-pin
The most affordable Asus motherboard based on the 2020 AMD B550 chipset with an AM4 processor socket. Made in the microATX form factor, it is positioned as a product of the middle price category, focused on use as part of universal office, multifunctional home configurations or entry-level workstations. In addition to small overall dimensions, which allow it to be installed in small Mini Tower cases, it is distinguished by the presence of a complete set of up-to-date system and peripheral interfaces.
Fully supports 3rd generation Ryzen 3/5/7/9 processors with Matisse Refresh/Matisse cores. Equipped with a reliable 6-phase Digi+ digital power subsystem for stable operation under long-term multi-threaded loads. The design and layout of the Asus PRIME B550M-K motherboard is carefully optimized and is perfect for DIY. Four slots for installing DIMM modules allow you to install up to 128 GB of high-speed DDR4 RAM (4x32 GB). Such an impressive volume is enough for any professional applications, 4K gaming and everyday tasks. Two M.2 SSDs are supported, one of which is capable of running the ultra-fast PCI-E 4.0 x4 interface. D-sub, HDMI 2.1 and DVI-D connectors allow you to use the Radeon Vega graphics core built into some processor models.
All specifications
Specifications PRIME B550M-K
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The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Asus 2026 - new arrivals, bestsellers, and the most relevant models Asus.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Asus 2026 - new arrivals, bestsellers, and the most relevant models Asus.
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Asus 90MB14V0-M0EAY0 | £76.99 |  | |||
ASUS PRIME B550M-K | B550, AM4, DDR4, M.2, SATA, USB 90MB14V0-M0EAY0 | £84.62 |  | |||
ASUS Prime B550M-K AMD B550 Micro-ATX Socket AM4 Motherboard 90MB14V0-M0EAY0 | £97.99 |  | |||
ASUS PRIME B550M-K AMD B550 Socket AM4 micro ATX 90MB14V0-M0EAY0 | £100.49 |  | |||
| £101.22 |  | ||||
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Series Asus Prime (stability/durability)Compare using chart →
micro-ATX, socket Intel LGA 1700, chipset Intel B760, 4 x DDR4, DIMM, 5333 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, Wi-Fi, M.2 cooling, no backlight
micro-ATX, socket AMD AM5, chipset AMD B650, 2 x DDR5, DIMM, 6400 MHz, USB-C, HDMI, M.2, LAN 2.5 Gbps, M.2 cooling, no backlight
micro-ATX, socket AMD AM4, chipset AMD B450, 4 x DDR4, DIMM, 4400 MHz, USB-C, HDMI, M.2, > 4 SATA3, no backlight
ATX, socket Intel LGA 1700, chipset Intel B760, 4 x DDR4, DIMM, 5066 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, M.2 cooling, no backlight
micro-ATX, socket Intel LGA 1700, chipset Intel H610, 2 x DDR4, DIMM, 3200 MHz, USB-C, HDMI, M.2, no backlight
micro-ATX, socket AMD AM4, chipset AMD B450, 2 x DDR4, DIMM, 4400 MHz, USB-C, HDMI, M.2, no backlight
micro-ATX, socket AMD AM4, chipset AMD A520, 2 x DDR4, DIMM, 4600 MHz, USB-C, HDMI, M.2, no backlight
micro-ATX, socket AMD AM4, chipset AMD B550, 4 x DDR4, DIMM, 4400 MHz, USB-C, HDMI, M.2, no backlight
micro-ATX, socket AMD AM4, chipset AMD B550, 4 x DDR4, DIMM, 4400 MHz, USB-C, HDMI, M.2, no backlight
micro-ATX, socket AMD AM5, chipset AMD B650, 2 x DDR5, DIMM, 7200 MHz, USB-C, HDMI, M.2, LAN 2.5 Gbps, no backlight
micro-ATX, socket Intel LGA 1200, chipset Intel H510, 2 x DDR4, DIMM, 3200 MHz, USB-C, HDMI, DisplayPort, M.2, M.2 cooling, no backlight
micro-ATX, socket AMD AM4, chipset AMD B550, 4 x DDR4, DIMM, 4866 MHz, USB-C, HDMI, M.2, Wi-Fi, no backlight
micro-ATX, socket Intel LGA 1700, chipset Intel B760, 4 x DDR5, DIMM, 7200 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, Wi-Fi, M.2 cooling, no backlight
micro-ATX, socket Intel LGA 1700, chipset Intel H610, 2 x DDR4, DIMM, 3200 MHz, USB-C, HDMI, DisplayPort, M.2, no backlight
micro-ATX, socket Intel LGA 1700, chipset Intel B660, 4 x DDR4, DIMM, 5333 MHz, USB-C, HDMI, DisplayPort, M.2, Wi-Fi, M.2 cooling, no backlight
ATX, socket AMD AM4, chipset AMD B450, 4 x DDR4, DIMM, 3200 MHz, USB-C, HDMI, M.2, > 4 SATA3, CrossFire, suitable for mining
micro-ATX, socket Intel LGA 1700, chipset Intel B660, 2 x DDR4, DIMM, 5333 MHz, USB-C, HDMI, M.2, no backlight
micro-ATX, socket AMD AM4, chipset AMD A520, 2 x DDR4, DIMM, 5100 MHz, USB-C, HDMI, M.2, no backlight
ATX, socket Intel LGA 1700, chipset Intel Z790, 4 x DDR5, DIMM, 7200 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, Wi-Fi, M.2 cooling
micro-ATX, socket AMD AM5, chipset AMD B850, 2 x DDR5, DIMM, 9600 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, M.2 cooling, no backlight
AccessoriesAll accessories for Asus PRIME B550M-K →
Model overview based on user reviews
The Asus PRIME B550M-K motherboard is a budget-friendly option that offers decent performance for home or office use, as well as for budget gaming builds. It supports AMD Ryzen processors and features an M.2 slot, USB 3.2, and a clear and easy-to-configure BIOS. The microATX form factor makes it suitable for small cases, and it operates stably without crashes. While the sound system may not satisfy audiophiles and the absence of VRM heatsinks could be a consideration for powerful processors, the board still provides good value with features like Wake-on-LAN, UEFI, and branded Asus software. However, the LED lighting can be annoying as it resets after each UEFI update. Overall, it's a reliable choice for those seeking a basic yet capable motherboard.
Pros
Cons
Reliable basic motherboard for an office or home PC, as well as a budget gaming build. I've been using the Asus PRIME B550M-K motherboard for over a month now, and I'm satisfied overall. For its price, it's a very decent option: it supports AMD Ryzen processors, has an M.2 slot, USB 3.2, and decent build quality. The BIOS is clear and easy to configure, especially if you don't have much experience. The board is compact (microATX), making it a good fit for a small case. It works stably without any crashes or startup issues. Not the best sound system — may be lacking for audiophiles. And the absence of radiators on VRM — not critical, but worth considering when installing a powerful processor.  Anastasiya G: use Asus PRIME B550M-K less than month |
Some budget motherboard, bought it for a budget build, but it turned out to be better than it seemed. Now it's working in a configuration with Ryzen 7 5700X, RTX 3060, 4x8GB RAM, 2 NVMe M.2, 1 SATA HDD, and it handles all of this excellently. The UEFI is truly flexible, very much so. Plus, it comes with various Asus software. It looks great. Wake-on-LAN UEFI Quality Branded software Capabilities At least some VRM heatsink for such money LED Lighting that annoys, which turns back on to disturb at night after each UEFI reset, and you have to recall where that parameter is in the advanced settings to turn it off.  Timur Solonskiy: use Asus PRIME B550M-K more than year |
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We recommendCompare using chart →
micro-ATX, socket AMD AM4, chipset AMD B550, 4 x DDR4, DIMM, 4866 MHz, USB-C, HDMI, M.2, Wi-Fi, no backlight
ATX, socket AMD AM4, chipset AMD B550, 4 x DDR4, DIMM, 4733 MHz, USB-C, HDMI, M.2, no backlight
ATX, socket AMD AM4, chipset AMD B550, 4 x DDR4, DIMM, 4600 MHz, USB-C, HDMI, DisplayPort, M.2, > 4 SATA3, LAN 2.5 Gbps, CrossFire, M.2 cooling
micro-ATX, socket AMD AM4, chipset AMD A520, 2 x DDR4, DIMM, 4600 MHz, USB-C, HDMI, M.2, no backlight
micro-ATX, socket AMD AM4, chipset AMD A520, 4 x DDR4, DIMM, 4866 MHz, USB-C, HDMI, DisplayPort, M.2, Wi-Fi, M.2 cooling
micro-ATX, socket AMD AM5, chipset AMD B650, 2 x DDR5, DIMM, 7200 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, CrossFire, M.2 cooling, no backlight
micro-ATX, socket AMD AM5, chipset AMD B650, 2 x DDR5, DIMM, 6400 MHz, USB-C, HDMI, M.2, LAN 2.5 Gbps, M.2 cooling, no backlight
ATX, socket AMD AM4, chipset AMD B550, 4 x DDR4, DIMM, 4733 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, M.2 cooling
ATX, socket AMD AM5, chipset AMD B650, 4 x DDR5, DIMM, 8000 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, Wi-Fi, M.2 cooling, no backlight
ATX, socket Intel LGA 1851, chipset Intel B860, 4 x DDR5, DIMM, 9200 MHz, USB-C, HDMI, DisplayPort, Thunderbolt 4, M.2, LAN 5 Gbps, Wi-Fi, M.2 cooling, no backlight
micro-ATX, socket AMD AM5, chipset AMD B850, 4 x DDR5, DIMM, 8200 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 5 Gbps, Wi-Fi, M.2 cooling, no backlight, White Edition
micro-ATX, socket Intel LGA 1700, chipset Intel B760, 4 x DDR4, DIMM, 5333 MHz, USB-C, HDMI, DisplayPort, M.2, LAN 2.5 Gbps, Wi-Fi, M.2 cooling, no backlight