Reputable. Usually, buzzing coils herald a power supply that is straining at the top of its ability to supply current to the attached loads. Extended overheating and simple age naturally reduces the maximum load that it can handle over time.

The Power supply unit could be loud because of a worn-out PSU fan or an unwanted substance on the fan, to mention a few. You can reduce the noise by replacing the fan or even cleaning the fan that has a lot of dust and unwanted substances.

The fan will get louder as it rotates faster to exhaust heat from the power supply. If the power supply is getting hot that means it is nearing its maximum capacity or the case temperature is so hot that it increases the power supply temperature, most likely it is caused by the power supply straining to supply demand.

If the noise isn’t air related but the fan motor and your willling to give this a go, disconnect from mains for 24hrs, open up psu, unscrew fan from casing, remove lable and you should see spindle, drop some machine oil on it and spin it in both directions until it disappears and repeat until it doesn’t.

Most of our power supply units (PSUs) have an inrush current bypass relay that makes a *click* noise when the PC turns on and off. This is considered normal and not a defect. If your PSU is making loud repetitive clicking sounds after you turn your PC on, contact Customer Support.

If by loudly, you are referring to an increase in its revolutions per minute, then the major cause may be a faulty heat sensor or heat. Furthermore, it could be a result of bad bearings and it may be ideal that the fan is changed. …

Filtering, bypass, and post-regulation are the three primary ways to reduce power-supply noise, but there are some less-used techniques. One is to use a battery to power your circuitry. Batteries are a very low noise power source compared to switching or even linear converters.

There are PSUs that are designed to shut the fan down when at low load, but PSUs that aren’t designed to work this way won’t have the passive cooling capacity to keep critical components from overheating. If you want a PSU that only turns its fan on when needed, buy one that is designed to work that way.

Fans are used to move the heat produced by the processor, motherboard, and graphics card out of the computer. If the fans are loose, too small, or not powerful enough, they can create noise. Loud noise is generally a very bad sign and should be dealt with immediately.

A PSU will briefly ‘spike’ to near max power draw for your components while the system initializes. If you have really power hungry components (I assume you do if you need a 1200W), then it’s not unrealistic for the fan to spin up and be quite audible.

Power supplies generate heat which could damage the components in the circuit. Because of this, power supplies need to have a cooling system to dissipate excess heat. Since they consume additional power, fans decrease the power supply efficiency.