Yes, it’s plug-and-play.
Computer ram plugs into slots on the motherboard.
Computer “cards” plugin, not RAM. The only thing that plugs in is the power cord for the card. And then if it’s an AGP card or PCI-E, you plug that into the corresponding slot on the motherboard. PCIe cards are installed with a bracket and screw. But you need to take your computer case off to access them when installing new components inside your computer…so back when my brother was buying his first laptop for college, he didn’t know how to install things himself so he had me do it for him)–AND WAS HAPPY I DID!