When building or upgrading a PC, many focus on selecting the fastest processor, most powerful graphics card, or largest storage. However, one component that is often overlooked, but crucial to system performance and stability, is the power supply unit (PSU). This component is the heart of your PC, responsible for supplying power to each of the components in your system efficiently and safely. In this blog, we’ll explore why the power supply is so important and how you can choose the right one for your setup.

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Why is the power supply so important?

System stability

A quality power supply provides a stable power supply to all your PC components. This is crucial to keep the system running efficiently, especially under heavy workloads like intensive gaming, video rendering, or running editing software.

Surge Protection

Fluctuations in the power supply can damage your PC components. A good PSU includes protections against overvoltage, short circuits, and overheating, safeguarding your investment.

Energy efficiency

Power supplies come with efficiency ratings that indicate how well they convert mains power into power usable by your PC, without wasting too much in the form of heat. An efficient power supply can help you save on your electricity bill and keep your system cooler.

How to choose the right power supply?

Calculate the energy consumption of your system

Before choosing a power supply, you should calculate the total power consumption of your PC. Online tools like PSU calculators can help you add up the power consumption of all your components. It is important to consider any future upgrades that may increase power consumption.

Consider efficiency

Power supplies are rated for efficiency with the 80 Plus standard, which ranges from 80 Plus White (the most basic) to 80 Plus Titanium (the most efficient). A PSU with a higher rating converts more power from the grid into usable power, generating less heat and consuming less electricity.

Select the appropriate capacity

Once you know the total power consumption of your system, choose a power supply that can provide at least that amount of power. As a general rule, it is advisable to get a PSU that can supply 20% more power than your system needs, which allows for future upgrades and ensures that the PSU is not running at maximum capacity all the time, which can reduce its useful life.

No escatimes en calidad

Investing in a high-quality PSU from a reputable manufacturer is crucial. A cheap or low-quality power supply can fail and damage other components in your system. Read reviews and choose reputable brands to ensure your system is safe and stable.


Power supplies come in non-modular, semi-modular and fully modular versions. Modular PSUs allow you to connect only the cables you need, reducing clutter and improving airflow inside your case. If the order and internal aesthetics of your PC are important to you, consider a modular power supply.

Final recommendations

  • Do your research: Before purchasing, do extensive research and consider your PC’s current and future needs.
  • Quality over price: Don’t compromise quality to save money. A high-quality PSU is an investment in the stability and longevity of your PC.
  • Consult reliable sources: Read reviews and recommendations on specialized hardware websites and forums to get reliable opinions.
  • Efficiency: Opt for an 80 Plus rated source that’s right for your budget and needs, balancing initial cost with long-term savings on energy consumption.

The power supply is a fundamental pillar in the construction of a PC, ensuring that your system receives clean and stable electrical power. Choosing the right PSU will not only protect your valuable components but will also provide you with the foundation for an efficient and reliable system. With the right guidance and careful selection, you can ensure that your PC runs optimally for years.

Remember that at Ibertronica.es we offer you a wide range of power supplies to satisfy all your needs. From economical solutions to high-performance options, we have the perfect power supply for you.

You can also contact us through our web page, phone (917 10 95 15) mail ([email protected]) or social networks, and request the necessary information to carry out your choice. An Ibertronica advisor will assist you and help you choose the power supply that best suits your needs and objectives.

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