With the side open, you should be able to tell whether it is the power supply making the funny or high-pitched sound. Open up one of the side panels on your computer and turn the computer on. Many sounds can appear to come from the back of a computer because it is the most open part of the case. Remember that the power supply is usually located at the top and back of a computer case. Verifying the Source of the NoiseĪlthough a funny, high-pitched sound may appear to be coming from your power supply, it may actually be coming from another component inside of your computer. Read on to learn how to isolate and diagnose a funny, high-pitched sound coming from your computer’s power supply. Whether the sound is consistent or intermittent, loud or soft, or high- or low-pitched, the sound is likely caused by two possibilities. Other than not working, the most annoying aspect to a PSU is when it starts making a high-pitched or funny sound. Some last for a few years and some last for a few months.

Your computer’s Power Supply Unit (PSU) is a strange and often frustrating component in any system.

Computer high pitched whine