HP ZBook 15 G5 G6 Laptop CPU & GPU Cooling Fan

Description

The HP ZBook 15 G5 and G6 are powerful mobile workstations used for demanding tasks like 3D rendering, video editing, and software development. If you’re experiencing issues with the CPU and GPU cooling fan, or you’re looking to replace or upgrade the cooling system, it’s essential to understand the components and cooling design specific to these models.

Cooling System for HP ZBook 15 G5 & G6:

Both the G5 and G6 models use similar cooling solutions that feature dual fans—one for the CPU and one for the GPU—often in a combined heat sink design. These fans work together to maintain optimal temperatures during heavy workloads.

Common Cooling Fan Issues:

1. Overheating: Can cause thermal throttling, system instability, or performance degradation.
2. Noisy Fans: Dust accumulation or fan motor failure can make the fans noisy.
3. Fan Failure: If one of the fans stops working, your CPU or GPU may overheat, leading to potential damage.

Steps to Address Cooling Fan Issues:

1. Clean the Fans:
   • Dust and debris can clog the fans, making them less efficient. Use compressed air to blow out dust from the cooling vents and fans.
   • For more thorough cleaning, you may need to open up the laptop, which could void the warranty, so proceed with caution.
2. Check for Fan Failure:
   • If one of the fans is not spinning or is making unusual noises, it might be defective. You can test the fans using diagnostic software (e.g., HP Hardware Diagnostics) to see if they’re functioning properly.
3. Thermal Paste Replacement:
   • The thermal paste between the CPU/GPU and the heatsink may degrade over time, reducing heat dissipation efficiency. Replacing the thermal paste can improve thermal performance.
4. Reapply the Cooling Paste:
   • If you open the system to clean or replace the cooling fan, it’s a good opportunity to reapply thermal paste to the CPU and GPU.
5. Replace the Fan or Heatsink Assembly:
   • If cleaning doesn’t help or the fan is defective, consider replacing the fan or the entire heatsink assembly.
     • For the G5 and G6 models, HP sells replacement parts directly, and third-party vendors also offer compatible fans. Ensure you get the right part for your exact model (G5 or G6).

Replacing the Cooling Fan:

For HP ZBook 15 G5:

• Fan Part Numbers:
  • CPU Fan: 854740-001
  • GPU Fan: 854739-001
  • Heatsink Assembly: 854744-001

For HP ZBook 15 G6:

• Fan Part Numbers:
  • CPU Fan: 6G4C2AA
  • GPU Fan: 6G4C3AA
  • Heatsink Assembly: 6G4C4AA

Make sure you have the correct part number based on your specific model and configuration.

Tips for Long-Term Cooling Efficiency:

• Use a cooling pad when using the laptop for extended periods, especially in high-performance tasks.
• Monitor system temperatures using software like HWMonitor, Core Temp, or HP’s built-in diagnostic tools.
• Ensure proper airflow: Keep the cooling vents unblocked to avoid restricting airflow.

Final Thought:

If you’re still experiencing cooling problems after performing the above steps, it may be worthwhile to consult HP support or visit a professional repair service. Overheating can cause permanent damage to the components, so it’s best to address cooling issues promptly.