what are the expansion slots
What Is PCI Express 5.0, and Why Does It Matter for the ...
The M.2 slots are abundant with three slots on the motherboard and an accompanying ROG PCIe M.2 expansion card allowing you to add two more hard drive slots.
Expansion card
The document discusses various components of a motherboard including the CPU, expansion slots, expansion cards, RAM slots, ports, and connectors.
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PCI Expansion slots. Up to 7 PCIe slots: 6 general purpose PCIe 3.0 slots plus one slot reserved for the M.2 adapter. General purpose slots are as follows:.