CoreforgeFinally tried to hook up an AM4 chipset to a raspberry pi (someone suggested this on the pi-pci repository a few years ago), and it turns out it mostly just works.
omegatotal@coreforge That's pretty amazing, now if somebody could just come up with a simple socket adapter Pcb, for the FPC to just clip into, and maybe even have it power the pi
@omegatotal someone briefly started on a cm5 carrier board. I don't think powering it through the socket would work though, the socket only provides 3.3V at the highest, and I don't know how much current you get get through there (it's only two pins)
@coreforge you have plenty of current available on a CPU socket on an AM4 platform to give you whatever you need to boost up to the voltage of a pi, it's a little bit wasteful but you know whatever. Considering it's designed to handle CPUs that draw over 100 watts in some cases, it's probably fine you just have to trigger the CPU power pins to get that 1.3ish volts that the CPU core normally uses and boost from that.
@omegatotal I guess that would work. I haven't had VCore turned on yet, but that can go up to 1.5V, which I think is the highest of the high power rails on the socket. For anything that's not a compute module (and for those as well tbh), it's easier though to just take 5V from the power supply directly, or through one of the rear USB ports that don't work anyways.
For a full carrier board it would be nice though if it's doable with the thickness of the inductors you'd need.