You know when people use human or anatomical analogies to describe parts of a PC, like how the CPU is the brain, the motherboard is the skeleton, your liquid cooling pipes are arteries, and power cables are… veins? OK, we've never heard of some of those either, but few anatomical analogies are more apt than the PSU (Power Supply Unit) being the beating heart of your PC, pumping the requisite amount of voltage into all those components.
It's not the most glamorous part of your PC, but a lot depends on it. A high-quality power supply will supply your GPU, CPU, motherboard, hard drives, you-name-it, with all the power they need to function at peak performance while its fan whirs quietly in the background. An energy-efficient PSU will keep your rig-running bills low over the long run, and you can even get modular ones to keep the inside of your PC case cable- and clutter-free.
