Regardless if you have a small home PC or a huge server, you need a reliable PSU if you want it to work. This humble little component is more important than you think. Aside from supplying power to the PC, it can also improve the component service life and save some money and power. The Corsair VS550 White Certified ensures safe transfer of mains electricity to separate circuits, which subsequently power the connected parts. The ATX PSU with a 550 W power is suitable for the more powerful mid-range PCs. The unit conceals a 120mm fan, which lowers the temperature and positively affects its service life. You can cut the electricity with a power switch. Every PC PSU on the market features a label that tells you how well it can use the input power. The 80 PLUS certification indicates an efficiency of up to 80 %.