Every PC we have has IPMI. We can re-image any PC even--if it can't boot--remotely. Even if we don't have the bitlocker key, etc.
[1] https://www.heise.de/news/Mobile-Device-Management-Einbreche...
Since IPMI is usually on servers, did you mean Intel vPro / AMD DASH for PC clients?
Most severs have a management microcontroller in them that is capable of administoring the main system, typically including (but not limited to) full keyboard video and mouse access.
Typically this is exposed through a dedicated ethernet port, allowing administrators to remotely manage their servers.