ASUS Pro B550M-C Motherboard
This user manual provides information necessary for installing and configuring the ASUS Pro B550M-C motherboard.
About This Manual
This guide is organized into the following sections:
- Product Overview: Describes the motherboard's features and supported technologies, including details on switches, jumpers, and onboard connectors.
- BIOS and RAID Support: Explains how to access BIOS, update BIOS using EZ Flash Utility, and RAID support.
Getting More Information
For additional information and product/software updates, refer to the following resources:
- ASUS Website: The ASUS website offers updated information on ASUS hardware and software products. Refer to ASUS contact information.
- Optional Documentation: Your product package may include optional documentation, such as warranty flyers, that may have been added by your retailer. These documents are not part of the standard package.
Manual Conventions
The following symbols are used in this manual to ensure proper task execution:
- CAUTION: Information to prevent component damage and personal injury when attempting a task.
- IMPORTANT: Instructions that MUST be followed to complete a task.
- NOTE: Tips and additional information to assist in completing a task.
Package Contents
Verify the motherboard package contents:
| Item | Quantity |
|---|---|
| Motherboard | 1 x Pro B550M-C motherboard |
| Cables | 2 x SATA 6Gb/s cables |
| Miscellaneous | 1 x I/O shield 3 x M.2 SSD screw packages 2 x M.2 SSD hex screw packages |
| Diskette with applications | 1 x Support DVD |
| Documentation | 1 x ACC Express activation card 1 x User manual |
Contact your retailer if any of the above items are damaged or missing.
Pro B550M-C Specifications Summary
| Category | Specifications |
|---|---|
| Processor | AMD Socket AM4 for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop Processors* *Refer to www.asus.com for the CPU support list. |
| Chipset | AMD B550 Chipset |
| Memory | For 3000 Series AMD Ryzen™ Desktop Processors: 4 x DIMM, Max. 128GB, DDR4 4600(OC)/4400(OC)/4266(OC)/4133(OC)/4000(OC)/3866(OC)/3733(OC)/3600(OC)/3466(OC)/3333(OC)/3200/3000/2800/2666/2400/2133 MHz Non-ECC, Un-buffered Memory* For 4000 G-Series AMD Ryzen™ Desktop Processors: 4 x DIMM, Max. 128GB, DDR4 4800(OC)/4600(OC)/4466(OC)/4400(OC)/4266(OC)/4133(OC)/4000(OC)/3866(OC)/3733(OC)/3600(OC)/3466(OC)/3333(OC)/3200/3000/2800/2666/2400/2133 MHz Non-ECC, Un-buffered Memory* Dual Channel Memory Architecture *ECC Memory support varies by CPU. *Refer to www.asus.com for the Memory QVL (Qualified Vendors List). |
| Graphics | 2 x DisplayPorts 1.2* 1 x HDMI™ 2.1 (4K@60Hz) *Graphics specifications may vary depending on CPU types. |
| Expansion Slots | For AMD Ryzen™ 3000 Series Desktop Processors: 1 x PCIe 4.0 x16 Slot (supports x16 mode) For AMD Ryzen™ 4000 G-Series Desktop Processors: 1 x PCIe 3.0 x16 Slot (supports x16 mode) AMD B550 Chipset: 1 x PCIe 3.0 x4 Slot** 1 x PCI Slot *Supports PCIe bifurcation for RAID on CPU function. **The PCIe x4 slot operates in x2 mode when the PCI slot is occupied. Supports AMD 2-Way CrossFireX™ Technology |
| Storage | Total support for 2 x M.2 Slots and 4 x SATA 6Gb/s ports M.2 Slot (M Key), Type 2242/2260/2280 (supports PCIe 4.0 x4 & SATA modes) for 3000 Series AMD Ryzen™ Desktop Processors. M.2 Slot (M Key), Type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) for 4000 G-Series AMD Ryzen™ Desktop Processors. Chipset: AMD B550 M.2_2 (M Key), Type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes). 4 x SATA 6Gb/s ports Supports RAID 0, 1, 10 |
| Ethernet | Realtek RTL8111H 1Gb Ethernet ASUS LANGuard |
| USB | Rear USB (6 ports total): 2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C®) 2 x USB 3.2 Gen 1 ports (2 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB (7 ports total): 2 x USB 3.2 Gen 1 headers support additional 4 USB 3.2 Gen 1 ports 2 x USB 2.0 headers support additional 3 USB 2.0 ports |
| Audio | Realtek ALC887 7.1 High Definition Audio CODEC* - Supports Jack-detection, Multi-streaming, Front Panel Jack-reconfiguration *For 7.1 Surround Sound audio output, an HD audio module in the front panel is required. |
| Rear I/O Ports | 2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C®) 2 x USB 3.2 Gen 1 ports (2 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 2 x DisplayPorts 1 x HDMI™ port 1 x Realtek RTL8111H 1Gb Ethernet port 3 x audio jacks 1 x PS/2 Keyboard port (Purple) 1 x PS/2 Mouse port (Green) |
| Internal I/O Connectors | For Fan and Cooling: 1 x CPU_FAN header 2 x CHA_FAN headers For Power: 1 x 24-pin EATX Power connector 1 x 8-pin ATX 12V Power connector For Storage: 2 x M.2 slots (M Key) 4 x SATA 6Gb/s ports |
| Internal I/O Connectors (Continued) | For USB: 2 x USB 3.2 Gen 1 connectors support additional 4 USB 3.2 Gen 1 ports 2 x USB 2.0 connectors support additional 3 USB 2.0 ports Miscellaneous: 1 x Clear CMOS header 1 x Chassis Intrusion header 1 x COM port header 1 x Front Panel Audio header (AAFP) 1 x LPC Debug header 1 x LPT header |
| Special Features | ASUS Q-Design - ASUS Q-DIMM - ASUS Q-Slot ASUS Thermal Solution - Aluminum heatsink design ASUS EZ DIY - Q-Connector Customized motherboard design and business features - ASUS Self-Restoring BIOS - ASUS Event Log - ASUS Commercial BIOS Kit - Moisture Resistance - 24/7 Reliability - Overvoltage Protection |
| Software | TPM2.0 IC onboard Exclusive ASUS Software Supported IT management software - ASUS Control Center Express (ACCE) |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS |
| Wake on LAN | Manufacturer WOL, PXE |
| Operating System | Windows 10 64-bit |
| Form Factor | ATX 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm) |
Specifications are subject to change without prior notice. Please visit the ASUS website for the latest specifications.
Motherboard Layout
The motherboard layout provides an overview of the components and connectors:
- CPU Socket: AMD Socket AM4 for AMD Ryzen™ 5000/ 4000 G/ 3000 series processors.
- DDR4 DIMM Slots: Four DIMM slots for DDR4 memory modules.
- Expansion Slots: PCIe x16 slot, PCIe 3.0 x4 slot, and PCI slot for expansion cards.
- Fan Connectors: Headers for system fans.
- Power Connectors: 24-pin ATX and 8-pin ATX 12V power connectors.
- M.2 Slots: M.2 slots for M.2 SSDs or Wi-Fi modules.
- SATA 6Gb/s Ports: Four SATA 6Gb/s ports for storage devices.
- USB 3.2 Gen 1 Headers: For front panel USB 3.2 Gen 1 ports.
- USB 2.0 Headers: For front panel USB 2.0 ports.
- Chassis Intrusion Header: For chassis intrusion detection.
- Clear CMOS Header: To clear CMOS settings.
- COM Port Header: For serial ports.
- Front Panel Audio Header: For front panel audio connections.
- LPC Debug Header: For LPC Debug cards.
- LPT Header: For parallel port devices.
- M.2 (E Key) Slot: For Wi-Fi modules.
- System Management Bus Header: For system management devices.
- Speaker Header: For system speaker.
- System Panel Header: Connects to the chassis power button, reset button, HDD LED, and system power LED.
- Thunderbolt Header: For Thunderbolt I/O cards.
Rear Panel Connectors
The rear panel provides various connectivity options:
- PS/2 Mouse Port (Green): For PS/2 mouse.
- DisplayPorts: For DisplayPort compatible devices.
- USB 3.2 Gen 2 Ports (Blue, Type-A): For USB 3.2 Gen 2 devices.
- Ethernet Port: Gigabit LAN connection. Includes LED indicators for link and activity.
- Audio Ports (Light Blue): For line-in, rear speaker out, or front speaker out depending on audio configuration.
- Line Out Port (Light Blue): For headphones or speakers.
- PS/2 Keyboard Port (Purple): For PS/2 keyboard.
- HDMI™ Port: For HDMI multimedia interface, HDCP compliant for HD DVD, Blu-ray playback.
- USB 2.0 Ports: For USB 2.0 devices.
- USB 3.2 Gen 2 Port (Type-C®): For USB 3.2 Gen 2 Type-C® devices.
- USB 3.2 Gen 1 Ports: For USB 3.2 Gen 1 devices.
- Microphone Port (Pink): For microphone connection.
Audio Configuration Table: Details the function of audio ports for 2, 4, 5.1, and 7.1 channel configurations.
CPU Installation
Follow these steps to install the CPU:
- Ensure all power cables are disconnected before CPU installation.
- Align the CPU with the socket and gently place it in. Do not force the CPU into the socket.
- Secure the CPU with the retention mechanism.
- Apply thermal interface material to the CPU and heatsink if necessary before installing the heatsink and fan.
System Memory Installation
Install DDR4 DIMM modules into the DIMM slots:
- Open the retention clips on the DIMM slots.
- Align the DIMM with the slot and press down firmly until the clips lock into place.
- Ensure modules are installed in the correct slots for dual-channel configuration. Refer to the manual for recommended memory configurations.
M.2 SSD Installation
Follow the diagrams to install M.2 SSDs:
- For 2242 M.2 SSD: Align the SSD and secure with screws.
- For 2260/2280 M.2 SSD: Align the SSD and secure with screws.
BIOS Support
Understanding BIOS
The ASUS UEFI BIOS is a Unified Extensible Firmware Interface that provides a user-friendly interface for system configuration. It supports keyboard and mouse input.
BIOS Setup Program
Use BIOS Setup to update BIOS or configure system parameters. Access BIOS Setup by pressing
ASUS EZ Flash 3
ASUS EZ Flash 3 allows BIOS updates without an operating system. Update BIOS via USB flash drive formatted with FAT32/16.
ASUS CrashFree BIOS 3
This utility automatically recovers the BIOS file if it becomes corrupted during an update. Recovery can be done using a USB flash drive containing the BIOS file.
RAID Configurations
The motherboard supports RAID 0, RAID1, and RAID10 configurations. Refer to the RAID Configuration Guide for detailed information.
- RAID 0 (Data striping): Optimizes read/write performance by striping data across two drives. Requires two new, identical hard drives.
- RAID 1 (Data mirroring): Mirrors data from one drive to another for redundancy. If one drive fails, the system uses the surviving drive. Requires two new drives or one existing and one new drive of the same or larger size.
- RAID 10: Combines data striping and mirroring for improved performance and redundancy. Requires four new drives or one existing and three new drives.
Appendix
FCC Compliance Information
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Industry Canada Compliance (ISED)
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
VCCI: Japanese Statement of Compliance
This device is classified as a Class B Information Technology Equipment and is intended for household environments. However, it may cause radio or television interference if used near these devices. Please follow the instructions in the manual for proper usage.
KC: Korean Warning
This is a Class B device (home broadcast communication equipment) intended for household use and can be used in all areas.
RoHS Compliance
The product complies with EU RoHS Directive, Indian RoHS rules, Vietnam Circular 30/2011/TT-BCT, and Turkish RoHS regulations.
ASUS Recycling/Takeback Services
ASUS is committed to environmental protection through its recycling and takeback programs. Visit csr.asus.com/english/Takeback.htm for regional recycling information.
California Proposition 65 Warning
WARNING: Cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.
EU Declaration of Conformity
ASUSTeK Computer Inc. declares that this device complies with the essential requirements and other relevant provisions of related directives. The full text of the EU Declaration of Conformity is available at: www.asus.com/support
