I'm a user, non-technical, with a *little* bit of knowledge gleaned from friends who do computer hardware maintenance; I've swapped in/out RAM and a power supply, the latter of which I definitely did ...

Power supplies are a frequently misunderstood—and overlooked—PC component. Many users choose a PC power supply based on total wattage alone, assuming that higher is always synonymous with better.

Every single desktop PC, console, or laptop has one of these. It won't boost your frame rate, nor does it have billions of transistors, and it's not manufactured using the latest chip process nodes.