COM-HPC only refers to the (hand waving a lot here) dimensional form factor and pinouts, of course, so there are some different variants. I don't know if I'd ca

COM-HPC only refers to the (hand waving a lot here) dimensional form factor and pinouts, of course, so there are some different variants. I don't know if I'd call this design typical but it's not unusual; I think I've seen ones with soldered RAM and also ones with slots that are parallel to the PCB, sort of like a SO-DIMM slot -- and also actual SO-DIMMs, too! They're pretty niche in practice.