Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your SOYO B75M DDR3-AX Motherboard. Please read this manual thoroughly before proceeding with installation to ensure proper setup and to prevent damage to your components.
The SOYO B75M DDR3-AX is a Micro-ATX motherboard designed for Intel 2nd and 3rd Generation Core and Xeon E-series CPUs with an LGA1155 socket. It features DDR3 memory support, a PCI-E 3.0 x8 slot, M.2 (NVMe/NGFF) storage interface, SATA 2.0 ports, and integrated HDMI/VGA outputs, making it suitable for various desktop computer applications including gaming, audio/video, and office use.
Setup and Installation
1. Motherboard Layout and Dimensions
Familiarize yourself with the layout of the motherboard before installation. Below is a diagram highlighting key components and connectors.
The motherboard dimensions are 170mm x 170mm (Micro-ATX form factor).
2. CPU and Fan Installation
When installing the CPU, ensure it is in good condition and the mainboard pins are correct. Always handle the CPU by its edges to avoid touching the pins or contacts.
- Open the nail hook on the CPU socket.
- Pull the rod to the fully open position.
- Remove the plastic cover from the socket.
- Carefully insert the CPU into the slot, ensuring the CPU notch aligns with the socket. Hold the bottom edge of the CPU tightly.
- Gently press the tie rod against the bearing plate and close the tie rod.
- Hook the pressure rod with the hook on the side of the base to secure the CPU.
- Before installing the fan, ensure that the four nails are properly installed. Align the mounting holes on the fan and mainboard. Press the fan down hard until the four nail hooks are jammed into the four holes on the motherboard.
- Press down the four nail hooks to secure the fan. Verify that the four nail hooks have been inserted correctly by checking the underside of the motherboard.
- Connect the power cable of the CPU fan to the CPUFAN power port on the mainboard.
Notice:
- As long as the CPU is not installed, put a plastic protective cover over the CPU slot to avoid damage to the slot.
- The CPUFAN and SYSFAN1 ports support +12V system cooling fans. If your motherboard has an integrated system hardware monitoring chip, use a fan that supports fan speed detection. Connect all system fans; some system fans may connect directly to the power supply if not connected to the motherboard.
3. Memory Installation
When installing memory, ensure the module has anti-overheating chips.
- Identify the single gap in the center of the memory module; this ensures correct orientation.
- Insert the memory module vertically into the DIMM slot. Push it in until the gold finger of the module is fully inserted.
- The plastic bayonet clips on both sides should automatically close. If inserted correctly, the gold finger part will not be visible.
- Manually check that the memory module is locked by the slot clip.
4. Front Panel and Audio Connections
The mainboard provides links to the chassis panel and indicators. Refer to the pinout diagrams for correct connection.
F_PANEL/SPEAKER: Front Panel Interface
- Pin 1: Power LED+
- Pin 2: Power LED-
- Pin 3: HDD LED+
- Pin 4: HDD LED-
- Pin 5: Reset Switch
- Pin 6: Power Switch
- Pin 7: Speaker+
- Pin 8: Speaker-
- Pin 9: Reserved
- Pin 10: No Pin
F_USB1/F_USB2: USB Insert Pin
This interface is compatible with I/O front panel connection specifications for high-speed USB peripheral interfaces (e.g., USB HDD, digital camera, MP3 player, printer).
- Pin 1: VCC
- Pin 2: VCC
- Pin 3: USBD-
- Pin 4: USBD-
- Pin 5: USBD+
- Pin 6: USBD+
- Pin 7: Ground
- Pin 8: Ground
- Pin 9: No Pin
- Pin 10: USBOC
Audio: Front Panel Audio Interface
This interface connects front panel audio.
- Pin 1: MIC L
- Pin 2: Ground
- Pin 3: MIC R
- Pin 4: PRESENCE#
- Pin 5: Head Phone R
- Pin 6: MIC Detection
- Pin 7: SENSE SEND
- Pin 8: No Pin
- Pin 9: Head Phone L
- Pin 10: Head Phone Detection
Operating Instructions
1. BIOS Settings
After powering up the computer, the system will begin the POST (Power-On Self-Test) process. When the information appears on the screen, press the DEL key to enter the BIOS setup program. Press F7 to enter the USB flash drive for quick boot.
If the information disappears quickly, shut down and restart the system by pressing the RESET button on your chassis, or by pressing Ctrl + Alt + Delete simultaneously. Then try pressing DEL immediately after power-on.
Main Page
The BIOS Main Page allows you to configure basic system settings such as system time, date, and view system information like BIOS vendor, core version, and total memory. Use the arrow keys to navigate and Enter to select options.
Boot Menu
The Boot Menu allows you to set USB drive boot options and configure boot priorities for various storage devices. You can enable/disable Fast Boot, Quiet Boot, and set the boot order for your operating system or installation media.
Specifications
The following table details the technical specifications of the SOYO B75M DDR3-AX Motherboard.
| Feature | Description |
|---|---|
| Brand Name | SOYO |
| Model | B75M DDR3-AX (SY-B75M D3-AX) |
| Chipset Manufacturer | Intel |
| Chipset | Intel B75 |
| Socket Type | LGA 1155 |
| Processor Compatibility | Intel 2nd and 3rd Generation Core CPUs, Intel Xeon E-Series CPUs (e.g., G1620, i5-2400, i7-3770) |
| Memory Type | DDR3 |
| Memory Slots | 2 x DDR3 DIMM slots |
| Maximum RAM Capacity | 16 GB (8GB per slot), supports 1600MHz |
| Storage Interface Type | 3 x SATA 2.0, 1 x M.2 (NVMe/NGFF, jumper switch required) |
| PCI-E Standards | PCI-E 3.0 |
| PCIe Slots | 1 x PCIe X8 slot |
| Onboard LAN | 1 x RJ45 (Realtek Gigabit Ethernet Chip) |
| Back I/O Ports | HDMI, VGA, 2 x USB 3.0, 4 x USB 2.0, 1 x RJ45, Audio (Line out, Mic In, Line In) |
| Onboard Connectors & Header | 24-pin Main Power Connector, 4-pin ATX power connector, 1 x F_PANEL header, 1 x 4-pin CPU fan header, 1 x 3-pin SYS fan header, 1 x F_Audio front panel header, 1 x USB 2.0 header, 1 x USB 3.0 header, 1 x 4-pin buzzer header |
| Audio Chipset | Realtek High-Definition Audio Chip |
| Application | Desktop |
| Usage Scenario | Enthusiast & Overclocking, Gaming, Audio & Video, Office |
| Form Factor | Micro-ATX |
| Product Dimensions | 170 mm × 170 mm |
| Operating Environment | -20°C ~ 60°C temperature, 0~95% relative humidity (non-condensing) |
| Power Consumption | Standby: 20~50 W; Full-load: 80~120 W (for reference only) |
| RAID Supported | No |
| With CPU | Yes (if purchased as a kit, otherwise motherboard only) |
| Battery Included | No (CR2032 battery required) |
Maintenance
1. CMOS Battery Installation/Replacement
NOTICE:
Due to logistics reasons, the CR2032 3V battery for the motherboard's CMOS has been removed before shipping. Please purchase a CR2032 3V battery and install it into the battery holder on the motherboard.
To install or replace the CMOS battery:
- Locate the circular battery holder on the motherboard (labeled JBAT in Figure 2).
- If replacing, gently push the small metal clip on the side of the holder to release the old battery.
- Insert the new CR2032 battery with the positive (+) side facing upwards. The battery should click into place.
2. General Care
- Keep the motherboard and surrounding components free from dust. Use compressed air for cleaning.
- Ensure adequate airflow within your PC case to prevent overheating.
- Avoid touching motherboard components directly with bare hands to prevent electrostatic discharge (ESD). Use an anti-static wrist strap when handling components.
Troubleshooting
- Cannot enter BIOS Setup: If the BIOS entry prompt disappears too quickly, restart the system by pressing the RESET button on your chassis, or by pressing Ctrl + Alt + Delete simultaneously. Then try pressing DEL immediately after power-on.
- System Date/Time Incorrect: This is often caused by a missing or dead CMOS battery. Install or replace the CR2032 3V battery as described in the Maintenance section.
- No Display/System Not Booting:
- Check all power connections, especially the 24-pin ATX and 4-pin CPU power connectors.
- Ensure the CPU and memory modules are correctly seated in their sockets/slots.
- Verify that your power supply unit (PSU) meets the recommended wattage (at least 500W for this platform).
- If using a discrete graphics card, ensure it is properly seated in the PCIe X8 slot and has adequate power.
- Try booting with only one memory stick installed, or try different memory sticks if available.
- Peripheral Devices Not Recognized:
- Ensure USB devices are connected to the correct ports (USB 2.0 vs. USB 3.0).
- Check front panel header connections for USB and audio.
- Verify SATA cables are securely connected to both the motherboard and storage devices.
User Tips
- Power Supply: This motherboard platform requires a powerful power supply. Ensure your power supply unit (PSU) can provide sufficient wattage, with at least a 500W brand power supply recommended for stable operation, especially when using a discrete graphics card.
- CPU and Memory Compatibility: While the motherboard supports Intel 2nd/3rd Gen Core and Xeon E-series CPUs, always verify compatibility with your specific CPU model and ensure your DDR3 memory modules are compatible and installed in dual-channel configuration for optimal performance.
- M.2 Storage: The M.2 slot supports both NVMe and SATA protocols. Remember that a jumper switch may be required to select the correct protocol depending on your M.2 drive type. Consult the motherboard diagram (Figure 2) for the M.2 slot location.
Warranty and Support
For detailed warranty information and technical support, please refer to the official product page or contact your retailer. A comprehensive user manual in PDF format is also available for download from the product's support section, which may contain additional diagrams and troubleshooting steps.
Reference PDF Manual: User Manual (PDF)