1. Introduction
This manual provides detailed instructions for the installation, configuration, and maintenance of your GALAX B450M-G Micro-ATX motherboard. The GALAX B450M-G is designed to support AMD Ryzen processors (3rd, 4th, and 5th generation) using the AM4 socket, offering a robust platform for gaming, office, and enthusiast applications.
Important Note: The battery (CMOS battery) in the motherboard picture will be removed before shipment, as the use of batteries is prohibited in China Post and Customs regulations. Please acquire and install a CR2032 battery separately if needed.
2. Safety Information
- Always disconnect the power cord from the wall outlet before touching any components.
- Wear an electrostatic discharge (ESD) wrist strap or frequently touch a grounded metal object to prevent static damage to the motherboard and other components.
- Handle the motherboard by its edges to avoid touching sensitive components.
- Ensure proper ventilation in your PC case to prevent overheating.
- Keep the motherboard away from moisture and extreme temperatures.
3. Package Contents
Your GALAX B450M-G motherboard package should include the following items:
- GALAX B450M-G Micro-ATX Motherboard
- I/O Shield
- SATA Data Cables (quantity may vary)
- User Manual (this document or similar)
- Driver CD/DVD (or link to drivers online)
If any items are missing or damaged, please contact your vendor.
4. Specifications
| Feature | Specification |
|---|---|
| Brand Name | GALAX |
| Model | B450M-G |
| Form Factor | Micro-ATX (220 x 195mm) |
| Chipset Manufacturer | AMD |
| Chipset | AMD B450 |
| Socket Type | AM4 |
| Processor Compatibility | AMD Ryzen 3000 Series (R3, R5, R9), AMD Ryzen 4000 Series (R3, R5, R7, R9), AMD Ryzen 5000 Series (R3, R5, R7) |
| Memory Slots | 2 x DIMM DDR4 |
| Memory Type | DDR4 |
| Memory Channel | Double Channel |
| Maximum RAM Capacity | 64 GB (Supports 2 x 32GB) |
| PCIe x16 Slots | 1 x PCIe 3.0 x16 |
| PCI Slots | 1 x PCIe 2.0 x1 |
| Storage Interface Type | SATA, M.2 (NVMe) |
| SATA Ports | 4 x SATA 6Gb/s |
| M.2 Slots | 1 (Supports NVMe PCI-E 3.0 x4, compatible with SATA3, 2280 size) |
| Back I/O Ports | 1 x VGA, 1 x HDMI, 2 x USB 3.2 Gen1, 4 x USB 2.0, 1 x RJ45 LAN, 3 x Audio Jacks, 1 x PS/2 |
| Onboard LAN | 1x RJ45 (1000Mbps data transfer rate) |
| Audio Channels | 7.1 (Supports 6-channel surround sound effects) |
| RAID Supported | No |
| Quality Certification | CE, FCC |
| Usage Scenario | Enthusiast & Overclocking, Gaming, Office, others |
5. Setup Guide
5.1 Motherboard Layout
Familiarize yourself with the motherboard's components and connectors before installation. Refer to the diagram below for key locations.

Key components typically include:
- CPU Socket (AM4): Center of the board, where the processor is installed.
- DIMM Slots (DDR4): Two slots for RAM modules, usually located to the right of the CPU socket.
- PCIe x16 Slot: The primary slot for your graphics card.
- PCIe x1 Slot: For other expansion cards like network cards or sound cards.
- M.2 Slot: For NVMe or SATA M.2 SSDs.
- SATA Ports: For connecting SATA hard drives or SSDs.
- 24-pin ATX Power Connector: Main power input for the motherboard.
- 8-pin CPU Power Connector: Provides power to the CPU.
- Front Panel Headers: Connectors for your case's power button, reset button, USB ports, and audio jacks.
- Rear I/O Panel: Ports for external devices (USB, video, audio, LAN, PS/2).
5.2 CPU Installation
- Locate the AM4 socket on the motherboard.
- Lift the small metal lever on the side of the socket.
- Carefully align the triangular mark on your AMD Ryzen CPU with the corresponding mark on the socket.
- Gently place the CPU into the socket without forcing it. It should drop in easily.
- Lower the metal lever to secure the CPU in place.
- Install your CPU cooler according to its manufacturer's instructions.
5.3 Memory (RAM) Installation
- Locate the two DDR4 DIMM slots.
- Open the clips at both ends of the DIMM slot.
- Align the notch on the DDR4 memory module with the key in the DIMM slot.
- Insert the memory module firmly into the slot until the clips snap into place. Ensure both clips are closed.
- For dual-channel performance, install memory modules in both available slots.
5.4 Storage Device Installation
M.2 SSD Installation
- Locate the M.2 slot on the motherboard.
- Remove the M.2 standoff screw.
- Align the M.2 SSD's notch with the key in the slot and insert it at an angle.
- Gently push down the M.2 SSD and secure it with the standoff screw.
SATA Drive Connection
- Connect one end of a SATA data cable to a SATA 6Gb/s port on the motherboard.
- Connect the other end of the SATA data cable to your SATA hard drive or SSD.
- Connect a SATA power cable from your power supply unit (PSU) to the SATA drive.
5.5 Expansion Card Installation
- Locate the PCIe x16 slot for your graphics card or PCIe x1 slot for other expansion cards.
- Remove the corresponding slot cover from your PC case.
- Align the expansion card with the slot and press down firmly until it is seated correctly.
- Secure the card with a screw to the PC case.
5.6 Connecting Peripherals and Front Panel
- Front Panel Connectors: Connect the power switch, reset switch, HDD LED, power LED, front USB, and front audio cables from your PC case to the corresponding headers on the motherboard. Refer to the motherboard layout diagram and your case manual for exact pin assignments.
- Rear I/O Panel: Connect your monitor to the VGA or HDMI port, keyboard/mouse to USB or PS/2 ports, Ethernet cable to the LAN port, and speakers/headphones to the audio jacks.

5.7 Power Connections
- Connect the 24-pin ATX power cable from your PSU to the main 24-pin connector on the motherboard.
- Connect the 8-pin CPU power cable from your PSU to the 8-pin connector near the CPU socket.
6. Operating Instructions
6.1 First Boot and BIOS/UEFI Setup
- After assembling all components, connect your monitor, keyboard, and mouse.
- Power on your system.
- During startup, repeatedly press the 'DEL' key (or F2, F10, F12 depending on BIOS version) to enter the BIOS/UEFI setup utility.
- In the BIOS/UEFI, you can configure boot order, system time, and other advanced settings. Save changes and exit to boot into your operating system installer.
6.2 Driver Installation
After installing your operating system, install the necessary drivers for optimal performance. You can typically find these on the GALAX official website or a provided driver disk.
- Chipset Drivers: Essential for proper communication between motherboard components.
- LAN Drivers: For internet connectivity.
- Audio Drivers: For sound functionality.
- Graphics Drivers: If using an integrated GPU (APU) or a dedicated graphics card.
7. Maintenance
- Keep it Clean: Regularly clean dust from your PC components using compressed air. Dust can impede airflow and cause overheating.
- Check Connections: Periodically ensure all cables (power, data, and peripheral) are securely connected.
- BIOS Updates: Check the manufacturer's website for BIOS/UEFI updates, especially if you are installing a newer generation Ryzen CPU that was released after the motherboard.
8. Troubleshooting
- No Power: Ensure all power cables (24-pin ATX, 8-pin CPU) are firmly connected. Check your power supply unit (PSU) and wall outlet.
- No Display: Verify your monitor is connected to the correct video output (either motherboard's integrated graphics or dedicated GPU). Reseat your graphics card and RAM modules.
- System Not Booting: Check if the CPU, RAM, and storage devices are correctly installed. Listen for beep codes (if your motherboard has a speaker) which can indicate specific issues.
- Overheating: Ensure CPU cooler is properly installed and making good contact. Check case fan orientation for optimal airflow.
9. User Tips
- BIOS Update for Newer CPUs: If you are using a Ryzen 5000 series CPU, you might need to update the motherboard's BIOS to the latest version for full compatibility. This often requires a compatible older CPU or a BIOS Flashback feature (check if your specific board supports it).
- RAM Compatibility: Always check the motherboard's Qualified Vendor List (QVL) for RAM to ensure optimal compatibility and stability, especially when aiming for higher memory speeds (e.g., 3200MHz).
- Cable Management: Good cable management improves airflow and makes future maintenance easier.
- CMOS Battery: Remember to install a CR2032 CMOS battery if one was not included, as it's essential for maintaining BIOS settings and system time.
10. Warranty and Support
This product comes with a three-year warranty. For technical support, warranty claims, or further assistance, please contact your vendor or the official GALAX support channels. Keep your proof of purchase for warranty purposes.





