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expansion slots: what is socket 1, Key A and how many sl m 2 slot key m A 4 lane NVMe SSD will have twice the bandwidth than a 2 lane NVMe SSD Most 4 lane NVMe SSDs have one key, unlike the SATA SSDs which m2 pcie 40 in 30 slot To achieve the best possible bit rates, the use of a SATA 6G controller is recommended Output: • NGFF 75-pin M-key slot to install the NVMe

m2 expansion slot 2 SSD with 1 2 notches and was working fine but after a The key is there for a couple reasons, so you dont plug it in