Every single desktop PC, console, or laptop has one of these. It doesn't boost your frame rate or churn out cryptocurrency; it doesn't have billions of transistors and it's not made using the latest semiconductor process node. Sounds boring, right? Not at all! This thing is super important because without it, our computers would do absolutely nothing.

Power supply units don't break headlines like the latest CPUs do, but they're awesome pieces of technology. So let's put on our gowns, masks, and gloves, and pull open the humble PSU – breaking down its various parts and seeing what each bit does.

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