In the context of desktop and laptop motherboards, what does the designation M.2 represent?
A motherboard form factor designed for building ultra-small desktop computers.
An external storage interface that uses a proprietary USB-C style cable.
A specification for internally mounted expansion cards and their edge-connectors, commonly used for SSDs and other modules that communicate over SATA or PCIe buses.
A digital video connector intended to replace HDMI on portable computers.
M.2 is a specification that defines the physical form factor and edge-connector pin-out for internally mounted expansion cards. An M.2 slot on a motherboard can expose SATA, PCIe (often NVMe), and in some implementations USB buses, allowing devices such as SSDs, Wi-Fi adapters, or cellular modems to be installed without separate data- or power-cables. It is not a motherboard form factor, an external cabling standard, or a video interface. The correct option therefore identifies it as an internal expansion-card and connector specification; the other options mis-characterize it as a board size, external interface, or display port.
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What is the difference between M.2 and SATA SSDs?
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What do NVMe and PCIe mean in the context of M.2?
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