Intel latest chips (most of Core i5 and Core i7 chips) support remote KVM functionality based on VNC protocol. Basically, the chip runs an embedded VNC server that can talk out-of-band over optional TLS layer with a supported VNC client.
The problem is supported VNC clients are usually costly. The one that is often recommended for use is RealVNC Viewer Plus. That costs $100 a license.
Intel, however, provides one free viewer in their AMT Software Development Kit. It is the Integrated Viewer Application sample.