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    Desktop PCs
    airflow

    PC Case and Housing Airflow

    Quick Answer

    This guide covers optimising PC case airflow for better cooling performance and component longevity.

    Please note: This guide is provided for informational purposes only. Any steps you choose to follow are at your own discretion and risk. If you're unsure, we recommend booking a professional diagnosis.

    Quick Checks

    Try these fast checks first — they solve most cases.

    1. 1

      Check fan orientation

      Front and bottom fans should intake. Rear and top fans should exhaust.

    2. 2

      Clean dust filters

      Remove and wash dust filters. Clogged filters restrict airflow.

    3. 3

      Check all fans spinning

      Open the case and verify all installed fans are operational.

    4. 4

      Remove cable clutter

      Poor cable management blocks airflow. Route cables behind the motherboard tray.

    5. 5

      Check for blocked vents

      Ensure the PC is not pushed against a wall blocking intake or exhaust.

    Guided Troubleshooting

    Answer these questions to narrow down the issue.

    Are your component temperatures higher than normal?

    Does the PC have more exhaust fans than intake?

    Is the case placed on carpet or enclosed in a cabinet?

    Possible Causes

    Incorrect fan orientation

    Very Common

    Fans blowing in wrong directions disrupt airflow path.

    Dust buildup

    Very Common

    Dust on filters, fans, and heatsinks insulates heat.

    Insufficient fans

    Common

    Too few fans cannot move enough air through the case.

    Poor cable management

    Moderate

    Cables blocking airflow paths reduce cooling efficiency.

    Case design limitations

    Less Common

    Some cases have restricted airflow by design.

    Self-Fix Instructions

    Safe steps you can try at home.

    Optimise fan configuration

    1. Front fans: intake (pulling air in). 2. Rear fan: exhaust (pushing air out). 3. Top fans: exhaust (hot air rises). 4. Bottom fans: intake (if case supports). 5. Aim for slightly positive pressure (more intake than exhaust).

    Deep clean the case

    1. Power off and unplug the PC. 2. Remove dust filters and wash with water. Let dry completely. 3. Use compressed air to blow dust from fans, heatsinks, and components. 4. Wipe down case interior with a dry cloth.

    Improve cable management

    1. Route all cables behind the motherboard tray. 2. Use cable ties or Velcro straps. 3. Keep the main chamber clear for unobstructed airflow. 4. Modular PSUs help reduce unnecessary cables.

    Upgrade cooling if needed

    1. Add fans to empty mounting points. 2. Consider upgrading to a better CPU cooler. 3. Ensure GPU has adequate clearance below for intake. 4. Monitor temperatures after changes.

    Safety Warnings

    • Always power off and unplug before working inside the PC.
    • Do not use a vacuum cleaner inside the PC. Static can damage components.
    • Ensure dust filters are completely dry before reinstalling.
    • Check that no cables are touching fan blades after cable management.

    When troubleshooting isn't enough

    If these steps didn't resolve the issue, a professional diagnosis can identify the root cause.

    FixFix Labs is not responsible for pre-existing data loss or undisclosed damage.

    All repairs carry inherent risk. Complex or liquid-damaged devices may have unpredictable outcomes.

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