There’s more to getting the right power supply than just picking the one with the highest number
Power supply units (PSUs) are an essential component of any computer for what should be fairly obvious reasons. Most of us don’t waste a second thought on our power supplies for the majority of the time we use our PCs, but when the time comes to buy a new one, you’ll find that PSUs are as complex and varied as any other computer component and just as deserving of the proper attention.
In case you suddenly find yourself thrust into a potentially confusing world of wattages, efficiencies, amps, volts and rails, we’re here to help. But fair warning: if you’re not building a performance or gaming system, some of this information will be of no practical value. If you are, though, it’s required knowledge. Either way, you might find it useful to know.