motherboard expansion slots
Differences Between M2 Cards M2 Slots Keys Sizes and ...
It describes the main components of a motherboard including the CPU socket, memory slots, I/O ports, BIOS, disk connectors, and expansion bus slots.
What is PCI Express? Do PCIe lanes, slots, and versions matter?
PCI Express uses physical slots to interconnect the expansion cards to the motherboard.
Expansion Slot in Computer - GeeksforGeeks
Expansion cards, also known as expansion boards or add-in cards, are circuit boards that are inserted into expansion slots on the motherboard of a computer.