1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the HP OMEN GT15 GT14 Motherboard, model M81915-603. This motherboard is designed for HP OMEN GT15 and GT14 series desktop computers, featuring an H670 chipset and support for 12th generation Intel processors with DDR4 memory.

2. Specifications
The following table outlines the key specifications of the HP OMEN GT15 GT14 Motherboard (M81915-603):
| Feature | Specification |
|---|---|
| Part Number | M81915-603 (also M81915-003, M75026-003, ID:894A) |
| Compatible Brand | HP |
| Chipset | H670 (Other) |
| CPU Socket | LGA 1700 |
| Memory Type | DDR4 |
| Onboard Memory | No |
| Onboard SSD | No |
| With CPU | No |
| Graphics Card Type | Integrated (requires CPU with integrated graphics) |
| Support Screen Size | Other |
| Battery Included | No |
| Origin | Mainland China |
3. Setup Instructions
Follow these steps carefully to install your motherboard. Always ensure your system is powered off and unplugged before handling internal components.
3.1. Preparation
- Safety First: Always wear an anti-static wrist strap or frequently touch a grounded metal object (like your PC case) to discharge static electricity before handling the motherboard or other components.
- Workspace: Work on a clean, flat, and well-lit surface.
- Tools: You will need a Phillips head screwdriver, thermal paste, and possibly cable ties.
3.2. Motherboard Installation
- Mounting: Align the motherboard with the standoffs in your PC case. Gently lower the motherboard into place, ensuring all screw holes align. Secure it with screws.
- CPU Installation:

Figure 2: Close-up view of the LGA 1700 CPU socket and DDR4 memory slots. - Open the CPU socket retention lever.
- Carefully place your 12th Gen Intel LGA 1700 CPU into the socket, aligning the golden triangle on the CPU with the triangle on the socket. Do not force it.
- Close the retention lever to secure the CPU.
- Apply a small amount of thermal paste to the center of the CPU.
- Install your CPU cooler according to its manufacturer's instructions.
- RAM Installation:
- Open the clips on the DDR4 memory slots.
- Align your DDR4 memory modules with the slots, ensuring the notch on the module matches the notch in the slot.
- Press down firmly on both ends of the memory module until the clips snap into place.
- Storage Installation (M.2 SSDs):
- Locate the M.2 slots on the motherboard.
- Insert the M.2 SSD into the slot at an angle.
- Push down the SSD and secure it with the provided screw or retention mechanism.
- Power Connections:
- Connect the 24-pin ATX power connector from your power supply to the motherboard.
- Connect the 8-pin (or 4+4-pin) CPU power connector to the motherboard.
- Front Panel Connectors: Connect the power button, reset button, USB ports, audio jacks, and LED indicators from your PC case to the corresponding headers on the motherboard. Refer to your PC case manual for specific pin layouts.
- Peripheral Connections: Connect any SATA drives, graphics cards, or other expansion cards.
- Rear I/O Panel:

Figure 3: Close-up view of the rear I/O panel, showing various ports like USB, Ethernet, and audio. Ensure all external peripherals (monitor, keyboard, mouse, etc.) are connected to the appropriate ports on the rear I/O panel.
4. Operating Instructions
4.1. Initial Boot-up
- After all components are installed and connected, plug in your power supply and turn on the system.
- The system should power on and display the BIOS/UEFI splash screen.
4.2. BIOS/UEFI Access
- During boot-up, repeatedly press the designated key (usually DEL, F2, or F10) to enter the BIOS/UEFI setup utility.
- Here you can configure boot order, system time, and other advanced settings.
4.3. Driver Installation
- After installing your operating system, install the necessary drivers for the chipset, audio, network, and any other integrated components. These are typically available on the HP support website for your specific OMEN GT15/GT14 model.
5. Maintenance
- Dust Cleaning: Regularly clean dust from the motherboard and components using compressed air. Ensure the system is powered off and unplugged before cleaning.
- BIOS Updates: Periodically check the HP support website for BIOS/UEFI updates. Updates can improve stability, performance, and compatibility. Follow HP's instructions carefully when updating the BIOS.
- Physical Handling: Always handle the motherboard by its edges to avoid touching sensitive components or pins.
6. Troubleshooting
- No Power/No POST:
- Check all power connections (24-pin ATX, 8-pin CPU).
- Ensure the CPU and RAM are correctly seated.
- Try booting with only essential components (CPU, one RAM stick, GPU if no integrated graphics).
- No Display:
- Verify monitor connection and input source.
- If using a dedicated graphics card, ensure it is properly seated and powered.
- If your CPU has integrated graphics, try connecting the monitor directly to the motherboard's video output.
- System Instability/Crashes:
- Check RAM for errors (e.g., using MemTest86).
- Ensure all drivers are up to date.
- Monitor CPU and GPU temperatures to prevent overheating.
- Component Compatibility: Ensure all installed components (CPU, RAM, GPU) are compatible with the H670 chipset and the motherboard's specifications.
7. User Tips
- Cable Management: Proper cable management improves airflow and makes future maintenance easier.
- Regular Backups: Always back up important data, especially before making significant hardware or software changes.
- Monitor Temperatures: Use monitoring software to keep an eye on your CPU and chipset temperatures to ensure optimal performance and longevity.
- Clean OS Installation: For best performance, consider a fresh operating system installation after a major hardware change like a motherboard replacement.
8. Warranty and Support
For warranty information and technical support, please refer to the original documentation provided with your HP OMEN GT15 or GT14 system, or visit the official HP support website. For issues related to this specific replacement part, please contact your seller directly.





