Correct: M.2 is an industry specification for internally mounted computer expansion cards and their connectors. It allows devices-most commonly SSDs-to interface directly with the system over PCIe, SATA, or USB lanes, depending on slot keying and motherboard support. It is not itself a motherboard form factor, power connector, or display interface.
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What are the common uses of M.2 slots in modern PCs?
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How does M.2 compare to older storage interfaces like SATA?