@Ad_Kersten @Ad_Kersten schrieb: I thought the first slot would have 2 nocks and the 2nd one 1 nock. On my pc these slots are identical, and that is the reason why I am in doubt whether my MB was built according to the specification It doesn't matter . The key in the ports are just a couple of missing contacts, which doesn't bother the M.2 SSDs as long as they have corresponding notches. Most SATA SSDs have two keys in there edge-connector, B + M, so the producer is free to put the SATA protocol onto the socket B or M, where he wants. Only the PCIe edge connector ist mainly and mostly for a M key PCIe SSD Socket, because the M-key connection provides the higher data rate than a B-Key connection. And no, you can not swap a SATA into a PCIe socket. It's different by the hardware wiring, the firmware and the assigned protocol. daddlle
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