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A compact AMD B550 platform engineered for stable, long-lifecycle business and DIY builds — combining PCIe 4.0, WiFi 6, dual M.2 storage and the ASUS Corporate Stable Model program on a space-efficient micro-ATX board.
The PRIME B550M-K WIFI-CSM brings together the essentials that matter most for business deployments and dependable daily builds: a proven AM4 platform, verified ASUS protection features, and the CSM program’s extended supply commitment.
The AM4 socket supports AMD Ryzen 5000 Series, 5000 G-Series, 4000 G-Series and 3000 Series Desktop Processors — giving you a wide upgrade path within the AMD ecosystem. Reference the ASUS CPU support list for exact processor validation.
With AMD Ryzen 5000 Series or 3000 Series Desktop Processors, the x16 expansion slot operates in PCIe 4.0 mode — offering significantly higher theoretical bandwidth than PCIe 3.0 for compatible graphics cards.
Two M.2 slots are available: M.2_1 at up to PCIe 4.0 x4 (64Gbps) with Ryzen 5000/3000 processors, and M.2_2 at PCIe 3.0 x4 via the chipset. Both also support SATA mode for flexible drive choices.
An onboard 1×1 WiFi 6 (802.11ax) module supports 2.4GHz and 5GHz bands for more efficient operation on crowded networks, while Realtek 1Gb Ethernet with ASUS LANGuard provides a reliable wired alternative.
Each CSM motherboard includes up to 36-month product lifecycle support with 6-month end-of-life notice, plus an ASUS Control Center Express activation key card for centralized IT monitoring and management.
Q-DIMM, Q-LED Core and Q-Slot simplify installation and troubleshooting, while SafeSlot Core reinforces the primary PCIe slot with stronger retention than standard expansion slots.
The Digi+ voltage-regulator module delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. It is one of five protection layers in ASUS 5X Protection III, alongside LANGuard, overvoltage protection, SafeSlot Core and a stainless-steel back I/O panel.
The board ships with a passive aluminium chipset heatsink and an array of hybrid fan headers — one 4-pin CPU fan header and two 4-pin chassis fan headers — that support both PWM and DC control. ASUS Fan Xpert 2+ software adds Auto-Tuning, Extreme Quiet mode and UEFI BIOS fan control.
Three Addressable RGB Gen 2 headers automatically detect LED counts on compatible devices and adjust lighting effects accordingly. Aura Sync synchronizes lighting across compatible ASUS and third-party hardware, managed through Armoury Crate.
The board ships with access to ASUS Armoury Crate (Aura Creator, Aura Sync, Fan Xpert 2+), ASUS DriverHub for automatic driver detection and updates, ASUS GlideX for cross-device screen sharing, ASUS CPU-Z, and UEFI BIOS with EZ Flash 3, CrashFree BIOS 3 and EZ Mode.
The PRIME B550M-K WIFI-CSM targets users who value stability, manageability and a long supply window over extreme overclocking features.
The CSM program’s up to 36-month lifecycle and 6-month EOL notice help standardize fleet hardware, with ASUS Control Center Express supporting remote monitoring and maintenance.
Dual-channel DDR4 up to 64GB, dual M.2 storage and Realtek 1Gb Ethernet cover productivity, light content work and office networking needs.
Q-Design features, hybrid fan headers and an accessible UEFI BIOS make first-time builds and upgrades straightforward on a compact micro-ATX footprint.
WiFi 6 and Bluetooth support reduce cable clutter, while HDMI and DisplayPort outputs on supported Ryzen processors enable integrated-graphics setups.
| Specification | Detail |
|---|---|
| Model Name | PRIME B550M-K WIFI-CSM |
| SKU | PRIME-B550M-K-WIFI-CSM |
| Part Number / MPN | 217503010 |
| CPU | AMD Socket AM4 for AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Series / 3000 Series Desktop Processors (refer to ASUS CPU support list) |
| Chipset | AMD B550 Chipset |
| Memory | 2 x DIMM slots, max. 64GB, DDR4; dual-channel architecture; speeds up to 5100(OC) and down through 2133, Un-buffered Memory (ECC support varies by CPU) |
| Graphics Output | 1 x DisplayPort (max. 4K@60Hz per DisplayPort 1.4); 1 x HDMI port (max. 4K@60Hz per HDMI 2.1) — available only on processors with integrated graphics |
| Expansion Slots | Ryzen 5000/3000 Series: 1 x PCIe 4.0 x16 (x16 mode); Ryzen 5000 G/4000 G Series: 1 x PCIe 3.0 x16 (x16 mode); AMD B550 Chipset: 1 x PCIe 3.0 x1 |
| Storage | 2 x M.2 slots and 4 x SATA 6Gb/s ports. M.2_1 (Key M) type 2280 supports PCIe 4.0 x4 & SATA modes with Ryzen 5000/3000, or PCIe 3.0 x4 & SATA modes with Ryzen 5000 G/4000 G. M.2_2 (Key M) type 2242/2260/2280/22110 supports PCIe 3.0 x4 & SATA modes via chipset. |
| RAID Support | AMD RAIDXpert2 Technology — supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10 |
| Ethernet | 1 x Realtek 1Gb Ethernet with ASUS LANGuard |
| Wireless & Bluetooth | WiFi 6 — 1×1 Wi-Fi 6 (802.11ax), supports 2.4/5GHz frequency band; Bluetooth (version may vary, refer to Wi-Fi module manufacturer) |
| Rear USB | 6 ports total: 4 x USB 5Gbps (Type-A), 2 x USB 2.0 (Type-A) |
| Front USB | 6 ports total: 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports; 2 x USB 2.0 headers support 4 additional USB 2.0 ports |
| Audio | Realtek 7.1 Surround Sound High Definition Audio CODEC — jack-detection, multi-streaming, front panel jack-retasking; up to 24-Bit/192 kHz playback; audio shielding, premium audio capacitors, dedicated audio PCB layers |
| Back Panel I/O | 4 x USB 5Gbps (Type-A), 2 x USB 2.0 (Type-A), 1 x DisplayPort, 1 x HDMI, 1 x Wi-Fi module, 1 x Realtek 1Gb Ethernet port, 3 x Audio jacks, 1 x PS/2 keyboard/mouse combo port |
| Internal I/O — Cooling | 1 x 4-pin CPU Fan header, 2 x 4-pin Chassis Fan headers |
| Internal I/O — Power | 1 x 24-pin Main Power connector, 1 x 8-pin +12V CPU Power connector |
| Internal I/O — Storage | 2 x M.2 slots (Key M), 4 x SATA 6Gb/s ports |
| Internal I/O — USB | 1 x USB 5Gbps header (supports 2 additional USB 5Gbps ports), 2 x USB 2.0 headers (support 4 additional USB 2.0 ports) |
| Internal I/O — Miscellaneous | 3 x Addressable RGB Gen 2 headers, 1 x Clear CMOS header, 1 x COM Port header, 1 x Front Panel Audio header (F_AUDIO), 1 x S/PDIF Out header, 1 x SPI TPM header (14-1 pin), 1 x 10-1 pin Front Panel System header |
| Special Features | ASUS 5X PROTECTION III (DIGI+ VRM, LANGuard, Overvoltage protection, SafeSlot Core, Stainless-steel back I/O); ASUS Q-Design (Q-DIMM, Q-LED Core, Q-Slot); ASUS Thermal Solution (Aluminum heatsink design); Aura Sync (Addressable RGB Gen 2 headers) |
| Software Features | Armoury Crate (Aura Creator, Aura Sync, Fan Xpert 2+); ASUS DriverHub; ASUS CPU-Z; ASUS GlideX; Norton 360 Deluxe (60 Days Free Trial); WinRAR (40 Days Free Trial); Adobe Creative Cloud (Free Trial); UEFI BIOS; ASUS EZ DIY (CrashFree BIOS 3, EZ Flash 3, UEFI BIOS EZ Mode) |
| BIOS | 16MB (128Mb) Flash ROM, UEFI AMI BIOS |
| Manageability | WOL by PME, PXE |
| Operating System | Windows 11, Windows 10 64-bit |
| Form Factor | micro-ATX — 9.6 inch x 8.7 inch (24.4 cm x 22.1 cm) |
| Accessories | Cables: 2 x SATA 6Gb/s cables. Miscellaneous: 1 x ASUS Wi-Fi moving antenna, 1 x I/O shield, 1 x M.2 anchor package. Documentation: 1 x ACC Express activation key card, 1 x Quick start guide. |
| Warranty | Warranty terms are not specified in the supplied product data. Please refer to your Alfrensia purchase documentation or contact Alfrensia support for the applicable warranty for this product in Egypt. |
PCIe 4.0 support and the M.2_1 operating mode both depend on which Ryzen processor you install. Only AMD Ryzen 5000 Series and 3000 Series Desktop Processors enable PCIe 4.0 mode; Ryzen 5000 G-Series and 4000 G-Series run PCIe 3.0 on the x16 slot and M.2_1. Check the ASUS CPU and memory support lists before finalizing your parts list, and confirm your chassis accepts the micro-ATX form factor (24.4 cm x 22.1 cm).
Every specification listed on this page is drawn from ASUS published product documentation for the PRIME B550M-K WIFI-CSM. Where information was not supplied — such as warranty duration for the Egyptian market — we state that clearly rather than guessing.
CPU, memory, storage, connectivity and I/O specifications are presented as published by the manufacturer.
Up to 36-month product lifecycle support with 6-month end-of-life notice under the ASUS Corporate Stable Model program.
DIGI+ VRM, LANGuard, overvoltage protection, SafeSlot Core and a stainless-steel back I/O panel.
Confirm your Ryzen processor and memory modules against the ASUS support lists before ordering.
The ASUS PRIME B550M-K WIFI-CSM combines PCIe 4.0, WiFi 6, dual M.2 storage and CSM lifecycle support in a compact micro-ATX board — a practical choice for business systems and reliable DIY builds.
Check CPU and memory compatibility before ordering
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| CHIPSET MANUFACTURERS | |
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| Motherboard Chipset | |
| Motherboard Type | |
| CPU SERIES | |
| Technology | |
| Memory Speed | |
| Max Memory Size | |
| Memory Slot | |
| PCI-E X16 | |
| PCI-E GEN | PCIe 4.0, PCIe 3.0 |
| PCI-E Slots (M.2) | |
| SATAIII | |
| Communication module | |
| Part Number | |
| Warranty |
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