- Available from 2026-11-24 — contact us to reserve
ASUS PRIME B550M-K, AMD, Socket AM4, AMD Ryzen 3000 Series, DDR4-SDRAM, 128 GB, DIMM
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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.<br><b><br>Tune It Your Way</b><br>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.<br><b><br>Cooler by Design</b><br>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.<br><br><b>Build on a Solid Foundation</b><br>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.<br><br><b>Little Things Make a Big Difference</b><br>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.<br><br><b>Outstanding Audio</b><br>Combined onboard features deliver elevated audio<br>Intelligent design and premium hardware create audio quality unlike anything you've ever experienced.
| Processor manufacturer | AMD |
|---|---|
| Processor socket | Socket AM4 |
| Compatible processor series | AMD Ryzen 3000 Series |
| Supported memory types | DDR4-SDRAM |
|---|---|
| Number of memory slots | 4 |
| Memory slots type | DIMM |
| Supported memory clock speeds | 2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4000,4133,4266,4400,4600 MHz |
| Maximum internal memory | 128 GB |
| Supported storage drive interfaces | M.2, SATA |
|---|---|
| Number of storage drives supported | 6 |
| RAID support | Yes |
| USB 2.0 connectors | 2 |
|---|---|
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| ATX Power connector (24-pin) | Yes |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
|---|---|
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| PS/2 ports quantity | 1 |
| HDMI ports quantity | 1 |
| DVI-D ports quantity | 1 |
| Ethernet LAN | Yes |
|---|---|
| Ethernet interface type | Gigabit Ethernet |
| LAN controller | Realtek RTL8111H |
| Wi-Fi | No |
| Top Wi-Fi standard | Not available |
| Motherboard chipset | AMD B550 |
|---|---|
| Component for | PC |
| Motherboard form factor | micro ATX |
| Motherboard chipset family | AMD |
| Windows operating systems supported | Windows 10 |
| PCI Express x1 (Gen 3.x) slots | 2 |
|---|---|
| PCI Express x16 (Gen 4.x) slots | 1 |
| Number of M.2 (M) slots | 2 |
| BIOS type | UEFI AMI |
|---|---|
| BIOS memory size | 256 Mbit |
| Width | 244 mm |
|---|---|
| Depth | 244 mm |
| Height | 51 mm |
Data sheet
Specific References