ASUS Prime B550M-A/CSM micro ATX motherboard- AMD B550 Socket AM4
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, and Aura Sync RGB headers support
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.
ASUS Corporate Stable Model
ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards. Offering up to 36-month product lifecycle support and 6-month end-of-life notice to allow sufficient lead times for your organization to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express – server-grade IT management software.
* Lifecycle support for consumer chipsets (eg. Q370, H370, B360,H270,B250) is set at 15 months. Program offerings may vary by region. Please consult your local sales representative for more information.
ASUS Control Center Express
ASUS Control Center Express is an integrated IT monitoring and management software designed to deploy faster, simplify IT operations and improve productivity with comprehensive control and user-friendly functions. ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality, TCO-optimized solution for your business needs.
Optimize IT endpoint management
Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely
Automate IT maintenance
Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility
Securely manage all of endpoints
Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices
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 productiv
Cool to the Core
Prime B550 series is engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.
VRM Heatsink and Thermal Pads
A VRM heatsink with underneath thermal pad improves heat transfer from the MOSFETs and chokes for better cooling performance.
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.
Little Things Make a Big Difference
Prime B550 series adds the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customize your system to create a uniquely personal look.
Outstanding Audio
Combined onboard features deliver elevated audio
Intelligent design and premium hardware create audio quality unlike anything you’ve ever experienced.
Audio Shielding
Separates analog/digital signal domains, significantly reducing multi-lateral interference.
Separate Layer for Left and Right Tracks
Ensures minimal crosstalk between audio paths.
Premium Japanese Capacitors
Premium parts provide an immersive sound signature, with exceptional fidelity.
| Processor | |
|---|---|
| Compatible processor series | 3rd Generation AMD Ryzen™ 3, 3rd Generation AMD Ryzen 5 |
| Processor socket | Socket AM4 |
| Processor manufacturer | AMD |
| Memory | |
|---|---|
| Unbuffered memory | Yes |
| Maximum internal memory | 128 GB |
| Supported memory clock speeds | 2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4000,4133,4266,4400,4600 MHz |
| Memory slots type | DIMM |
| Number of memory slots | 4 |
| Supported memory types | DDR4-SDRAM |
| Storage controllers | |
|---|---|
| Supported storage drive interfaces | M.2, SATA III |
| Internal I/O | |
|---|---|
| EPS power connector (8-pin) | Yes |
| Number of chassis fan connectors | 2 |
| CPU fan connector | Yes |
| ATX Power connector (24-pin) | Yes |
| Front panel audio connector | Yes |
| Number of SATA III connectors | 4 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| USB 2.0 connectors | 2 |
| Rear panel I/O ports | |
|---|---|
| Microphone in | Yes |
| Headphone outputs | 1 |
| DVI-D ports quantity | 1 |
| HDMI ports quantity | 1 |
| VGA (D-Sub) ports quantity | 1 |
| PS/2 ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| Network | |
|---|---|
| Wi-Fi | No |
| LAN controller | Realtek RTL8111H |
| Ethernet interface type | Gigabit Ethernet |
| Ethernet LAN | Yes |
| Features | |
|---|---|
| Windows operating systems supported | Windows 10 x64 |
| Audio output channels | 7.1 channels |
| Audio chip | Realtek ALC887 |
| Motherboard chipset | AMD B550 |
| Motherboard chipset family | AMD |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Expansion slots | |
|---|---|
| PCI Express x16 (Gen 4.x) slots | 1 |
| PCI Express x1 (Gen 3.x) slots | 2 |
| BIOS | |
|---|---|
| Clear CMOS jumper | Yes |
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |
| Logistics data | |
|---|---|
| Harmonized System (HS) code | 84733020 |
| Weight & dimensions | |
|---|---|
| Height | 51 mm |
| Depth | 244 mm |
| Width | 244 mm |
| Other features | |
|---|---|
| Weight | 845 g |
