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M.2 Family of Form Factors

Key Card measurements Interfaces Common uses
A 1630, 2230, 3030 PCIe x2, USB 2.0, I2C, DisplayPort x4 Wi-Fi/Bluetooth, cellular cards
B 3042, 2230, 2242, 2260, 2280, 22110 PCIe x2, SATA, USB 2.0, USB 3.0, audio, PCM, IUM, SSIC, I2C SATA and PCIe x2 SSDs
E 1630, 2230, 3030 PCIe x2, USB 2.0, I2C, SDIO, UART, PCM Wi-Fi/Bluetooth, cellular cards
M 2242, 2260, 2280, 22110 PCIe x4, SATA PCIe x4 SSDs