[pgeorgi]

AMD has a bunch of coprocessors in the chipset as well, but from the analysis that happened in our (coreboot) community, they're much less capable: fan control, one of them gets some firmware uploaded on boot to handle pcie hotplug (or something to that effect).

The system doesn't reserve memory for any of them, and they don't have official connections to the outside world (and are located in places that make such connections unlikely). Firmware is generally rather small, too.

None of them come with up to 5MB of firmware, tons of private RAM and official paths to network, graphics, system RAM and USB, like Intel chips.

Some more details on Intel and AMD at http://www.coreboot.org/Binary_situation