IPMI is often found on server boards, which sometimes even allow remote KVM to operate the server headless in the server room while still having full access to keyboard and video (some allow also the usage of a remote floppy/CD/USB devices).
For some ASUS boards this can be added later on: iKVM
Itís an embedded processor running e.g. its own Linux as soon as power is plugged in, so that the main power (and so the machine) can be switched on and off via network. This is independent from the used chipset.