Power Supply
Don't overlook the importance of a quality power supply
Power supplies are the components that power computers by converting the AC power from your home into DC power for your computer. A power supply unit (PSU) is mounted inside your desktop computer case and has a power cord that extends outside of the case to an electrical outlet. The power supply also regulates the electrical current and cools the computer with its built-in fans.
A good-quality computer power supply can increase your computer's performance, lifespan and overall reliability. It also minimizes the noise and heat levels generated by the computer.
If you are using a poor-quality power supply for computer or experience a power supply failure, your computer is at high risk for damage to its critical components. That's why investing in a proven, high-quality power supply is highly recommended.
Laptop computers run on battery power and therefore do not require a constant electrical power supply like desktops do. Laptops have external power supplies used to recharge the battery or for prolonged use of the laptop.
Must-Have Features
- Capacity to handle your computer components
- Proven quality
- Low-noise fan
- Good energy efficiency rating
Major Considerations
- How much wattage do I need for my computer? (Add up the wattage of all your components and add on another 100 watts to be safe. The result is the total wattage you need to power your computer.)
- Which connector is on my motherboard? (The power supply connects to the motherboard by a 20- or 24-pin connector or by an ATX 2.0 connector.)
Top Manufacturers
- Antec
- CoolerMaster
- ThermalTake
- Enermax
Common Accessories or Add-Ons
- Surge protector (power bar or power block)
- Uninterruptible power supply (battery backup)
Price Range
A good-quality power supply for an average computer user should cost anywhere from $50 to $100. Beware of low-cost PSUs, as they may not meet the power requirements of the latest processor models. For gamers and users who are running more CPU-intensive programs, a more expensive power supply will be necessary (from $100 - $400, depending on your exact requirements).
Summary
Purchasing a good-quality power supply that meets your computer's power requirements is very important. A poor-quality power supply can harm your computer's components and waste a lot of energy. With the right power supply, your computer will perform better, last longer, and generate less noise and heat. When shopping for a good power supply for your computer, make sure you know how much wattage your computer requires.
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