ASUS Prime B550M-A/CSM


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Prime Model B550M-A/CSM

Manufacturer Part#  PRIME B550M-A/CSM

Provantage Code:  ASUL3AP

Condition:  Factory New

  • Product Type: Desktop Motherboard
  • Product Line: Prime
  • Limited Warranty: 3 Year
  • Form Factor: Micro ATX
  • TAA Compliant: No

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ASUS PRIME B550M-A/CSM Specifications

    Prime B550M-A/CSM


    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

    • AMD AM4 socket: Ready for 3rd Gen AMD Ryzen™ Processors
    • Comprehensive cooling: VRM heatsink, PCH heatsink, and Fan Xpert 2+
    • Ultrafast connectivity: Dual M.2, PCIe 4.0, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A
    • Aura Sync RGB: Onboard addressable Gen 2 header for RGB LED strips, easily synced with Aura Sync-capable hardware

    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.

    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 productivity.

    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.

Additional Product Images


Product NamePrime B550M-A/CSM
Manufacturer Part NumberPRIME B550M-A/CSM
Product TypeDesktop Motherboard
Chipset ManufacturerAMD
Chipset ModelB550
Number of Memory Slots4
Gigabit EthernetYes
Number of SATA Interfaces4
Number of PCI Express x1 Slots2
Onboard VideoCPU Dependent Video
RAID SupportedYes
Number of Total Expansion Slots3
Number of PCI Express x16 Slots1
Total Number of USB Ports6
Total Number of Onboard USB Ports6
Total Number of PCI Express Slots3
Memory Form FactorDIMM


Number of M.2 Interfaces2
Number of USB 3.2 Ports6
Number of Onboard USB 3.2 Ports2
Memory TechnologyDDR4 SDRAM
Processor SocketSocket AM4
Form FactorMicro ATX
Processor SupportedRyzen 3

Ryzen 5

Ryzen 7

Ryzen 9

Ryzen 5 Pro

Ryzen 7 PRO

Ryzen 9 PRO

Total Processor Supported1
Controller TypeSerial ATA/600
Maximum Memory Supported128 GB
Environmentally FriendlyYes
Environmental CertificationRoHS
Audio Channels7.1
Number of Network (RJ-45) Ports1
Number of Onboard USB 2.0 Ports4
Onboard S / PDIF HeaderYes
Memory Speed Supported2133 MHz

2400 MHz

2667 MHz

2800 MHz

3000 MHz

3200 MHz

3333 MHz

3466 MHz

3866 MHz

3600 MHz

3733 MHz

4000 MHz

4133 MHz

4466 MHz

4600 MHz

4400 MHz

4800 MHz

4266 MHz

Country of OriginChina
Product ModelB550M-A/CSM
Product LinePrime
RAID Levels0



Limited Warranty3 Year
Brand CompatibilityAMD
WARNING: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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