So it was indeed supposed to include a RAM cartridge and not have it built into the motherboard, ok. Wish I had all the parts but hey, I can't really complain, now can I...
Any known problems with them regarding reliability? I guess I can measure the PSU before trying to turn it on, just in case. Probably should recap it too, or maybe it's better to leave that alone for now since it's never been opened. Decisions decisions.