Jani I wish there was one-stop online documentation on computer hardware. I don't mean manufacturers' sites, they're too scattered and (rightly so) individual solutions. But why isn't there an Internet Hardware Database? A community-edited wiki documenting which features are present on which (revision of which) piece of hardware.
I've kept my own wiki for the hardware at my disposal and it's proved valuable many many times over the years. But detailed data for hardware I'm only just considering can be a pain to find.
A presently acute example: which current desktop motherboards' UEFI support ATA security features?
