>Get a motherboard that lets you tweak voltage, current, and clock settings, and push the buttons until you get somewhere. Most enthusiast chips are good for a fair bit over what the box says.

Lol that's been completely false for the last few years or so, so you're talking out of your ass.

There's basically no meaningful headroom available on CPUs unless you start cranking out chilled water or liquid nitrogen (how does the normal consumer benefit?).

GPUs essentially have to be modded on the circuitry side to get any additional performance (but highly unstable) due to the power limits they have.