Power Supplies - Power Supply Unit (PSU)

The power supply unit (PSU) is the lifeline of your computer — without power, nothing works. A PSU takes the electrical signal from your wall outlet and distributes it to all components inside your computer.

Choosing the Right Wattage
The more powerful your computer components, the higher the wattage your power supply needs to deliver. An oversized PSU is inefficient, while an underpowered PSU causes system instability and crashes. The golden rule is to choose a PSU with a slightly higher wattage than your system's maximum power draw. Laptops come with a suitable power adapter included.