Every component powered by the PSU inside your computer case needs a good quality power source to work correctly. Power supply issues can cause components to malfunction or overheat. An overheating PSU can raise the internal temperature of your computer, depending on the PC airflow configuration.

Symptoms of an overheating PSU may include:

Freezing
Random restarts
Display glitches
Random shutdowns
Micro stuttering
Not starting up after restarting

Fixes for an Overheating PSU

Here is a compiled list of issues and fixes to help you understand what’s causing your PSU to overheat.

1. Clean the Inside of Your Computer

A clean computer will help lower the internal temperature in general.

Unplug your computer from power, disconnect all the power cables inside your system, unscrew it, and remove it to clean it properly.
Use a small brush and compressed air to clean all components effectively.
Do not open the PSU itself unless you are a qualified repair technician.
Clean the PSU by blowing compressed air through it. Use a proper air compressor or a can of compressed air.

Note: Wear a face covering and eye protection while cleaning.

2. Ensure Your PSU Is Adequately Powered

Ensure your power supply is matched to your system’s requirements. A PSU with extra power above the requirement can stay cooler and work with less strain.

Check your system’s requirements.
Opt for a PSU with a bit of extra power for longer lifespan and flexibility for future upgrades.

3. Check the Airflow Configuration Inside Your Computer Case

Modern case designs often draw air in from outside directly to the PSU.

Ensure there is adequate cooling inside your case.
Ensure plenty of air is taken in and moved out consistently.

4. Replace Aging Power Supplies

As PSUs age, they become less efficient and generate more heat. Replace your PSU after around five years.

5. Address Abnormal Load from Components

A component like a motherboard can have a failing part causing an abnormal load, drawing more power than usual and generating more heat.

Detect and replace faulty components causing abnormal loads.

6. Ensure All Connectors Are Properly Secured

A 24 pin ATX power connector that has been pressed down all the way, making a secure connection.

Check that all connectors associated with the PSU are firmly in place.

7. Verify PSU Fan Functionality

The PSU fan should start spinning when sufficient heat is generated.

Watch for fan rotation when the PSU heats up.
Use software for diagnostics, fan speed, and temperature reporting if available.

8. Ensure the PSU Can Breathe

Make sure the PSU has enough clearance from the floor to draw in adequate air.

If the PSU fan is facing downward, ensure it’s not too close to the floor.
Use a board under your computer case for better clearance if needed.

9. Maintain an Optimal Room Temperature

Higher ambient temperatures can increase your PSU’s temperature.

Move your computer to a cooler room or install an air conditioner.

10. Check Case Fan Speed Profiles and BIOS Settings

Ensure your fans are doing their job by setting appropriate speed profiles in the BIOS or using software.

Reset BIOS to optimum defaults if necessary.
Adjust fan speed settings to maintain reasonable internal temperature.

11. Replace the PSU if All Else Fails

If the PSU continues to overheat despite all checks, replace it with a new one. Do not buy a second-hand PSU.

Having a spare PSU is useful for future diagnostics.

For Laptops

Overheating PSUs can also be an issue for laptops. Consider the following:

Ensure you have the correct PSU adapter for your machine.
Check the laptop battery’s performance and replace it if necessary.
Keep the PSU adapter out of direct sunlight or away from heat sources.
Check for damaged cables and replace them immediately if found.
Ensure the PSU power adapter plug fits snugly into the laptop’s socket.
Clean the laptop’s interior and ensure the cooling system is dust-free.
Consider replacing the PSU adapter if it’s old.

Prevent A Computer PSU From Overheating