[Rockin Robbins]

My AMD microprocessor has that built in and it automatically works as long as it's enabled in BIOS. Laptops get really hot sometimes so most of those also have this feature that slows down or shuts down the computer when it's in danger of ignition.

Many motherboards have Cool & Quiet features that throttle your fans and microprocessor as needed to avoid damage. I'll give you specifics when I get home and have access to the thing.