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 Prime 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.
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 Prime 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.
Asus AMD B550 Prime B550M-K (Ryzen AM4) mATX MB
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 Prime 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.
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 Prime 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.
in 34 offers
last seen 20 Oct 2026
The lowest price we last saw for Asus AMD B550 Prime B550M-K (Ryzen AM4) mATX MB was $89.00 at PCByte AU, compared across 24 retailers (last seen 20 Oct 2026). Prices may have changed since.
The all-time low we recorded was $89.00 on 20 Oct 2026.
Prices last updated 20 Oct 2026.
Last updated at 20/10/2026 22:44:50
Asus Prime B550M-K ARGB AM4 mATX Motherboard (PRIME B550M-K ARGB)
Asus Prime B550M-K ARGB AM4 mATX Motherboard (PRIME B550M-K ARGB)
Delivery between 23–31 Oct $10
Asus Prime B550M-K ARGB AM4 mATX Motherboard (PRIME B550M-K ARGB)
Delivery between Fri – Tue $10
Asus Prime B550M K AM4 mATX Motherboard (PRIME B550M-K)
30-day returns
Asus Prime B550m-k Argb Matx Motherboard
Delivery $13
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Asus Amd B550M Prime B550M-K Argb (Ryzen Am4) Micro-ATX Motherboard 2X DDR4 64GB, Dual M.2, PCIe 4.0, Realtek 1Gb Ethernet, DP, Hdmi
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Delivery $28.99
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[PRIME B550M-K ARGB] Asus PRIME B550M K ARGB AMD Micro-ATX Motherboard
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originally posted on pccasegear.com
The motherboard was actually super great. The case I bought was confusing and slightly mis-shaped and made everything harder to but the motherboard sort of fixed that up and still slotted in really well and definitely became the basis for fixing everything else. It runs like an absolute gem.
originally posted on box.co.uk
Pros: I was very happy to find that i was able to use ryzen 5 processors out of the box and did not need a bios flash. Cons: I would have liked a rgb header.
originally posted on scorptec.com.au
Great cheap motherboard for budget gameing computer - will cover up a pcle slot when you put the graphics card in so really more suited to a workstation computer. If you want to game and have more space spend the extra 100 on a 570. It has handled my computer components well and i have zero complaints only gave 4 stars because i lost a pcle slot after putting in a graphics card and the wifi module is super close to the gpu in that second slot and covering one fan it would have been better for them to space them a bit better on the board. What do you want for a 100 odd dollars.
| Motherboard Socket Type | AM4 |
| Motherboard Chipset | AMD B550 |
| Motherboard Form Factor | Micro-ATX |
| Motherboard Model | Prime B550M-K |
| Motherboard Series | Prime |
Asus Prime B550M-K ARGB AM4 mATX Motherboard (PRIME B550M-K ARGB)
Asus Prime B550M-K ARGB AM4 mATX Motherboard (PRIME B550M-K ARGB)
Delivery between 23–31 Oct $10
Asus Prime B550M-K ARGB AM4 mATX Motherboard (PRIME B550M-K ARGB)
Delivery between Fri – Tue $10
Asus Prime B550M K AM4 mATX Motherboard (PRIME B550M-K)
30-day returns
Asus Prime B550m-k Argb Matx Motherboard
Delivery $13
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
The motherboard was actually super great. The case I bought was confusing and slightly mis-shaped and made everything harder to but the motherboard sort of fixed that up and still slotted in really well and definitely became the basis for fixing everything else. It runs like an absolute gem.
Pros: I was very happy to find that i was able to use ryzen 5 processors out of the box and did not need a bios flash. Cons: I would have liked a rgb header.
Great cheap motherboard for budget gameing computer - will cover up a pcle slot when you put the graphics card in so really more suited to a workstation computer. If you want to game and have more space spend the extra 100 on a 570. It has handled my computer components well and i have zero complaints only gave 4 stars because i lost a pcle slot after putting in a graphics card and the wifi module is super close to the gpu in that second slot and covering one fan it would have been better for them to space them a bit better on the board. What do you want for a 100 odd dollars.
Great bios and software, good component compatibility, but some bios updates may be required. Absolutely killer price which completely rules out the x570 boards.
Pros: This motherboard worked with the AMD Ryzen 5 5600g without requiring Bios updates.
Disappointed at first ,would not allow windows 11 ,needs TPM fitted
Pros: As a drop-in replacement for my previous board it worked fine - there were not as many SATA ports but there were M.2 connectors instead - and the layout is nice and accessible. Cons: The BIOS was almost two years old. Therefore it failed to support the latest generation (or even the last-but-one generation) of Ryzen 5 processors. Some ASUS boards have built in ways to diagnose the situation and to upgrade the BIOS in such situations, this one doesn't.
Much faster than her old computer (which I also built) this one is a beast- a one TB M.2 SSD AND A 512 GB M.2 SSD, got plenty of room for expansion, my wife loves it- Happy wife happy life!!!
all usable pcie ports are in accessable with my rtx2060 which is a shame as i needed to use one of the x1 slots for my wifi adapter which are all coverd from gpu other then that its a good board
Bought this together with a Ryzen 5 and 16GB of ram; it's a very capable board. The built-in RGB lighting was a surprise, but fortunately it can be deactivated. The boot time is really quite slow, though (hence the reduction in stars). This is especially so if you change anything (or on the very first boot - I did think something was wrong when I first powered up)
| Motherboard Socket Type | AM4 |
| Motherboard Chipset | AMD B550 |
| Motherboard Form Factor | Micro-ATX |
| Motherboard Model | Prime B550M-K |
| Motherboard Series | Prime |
