I have the Z270F mainboard with 7-PCIe and 2 M.2. I bought it because it's very similar to the ASUS Prime Z270A. With 4G decoding enabled all seven PCIe slots are working fine. But I just can't figure out how to get the M.2 to work. The M.2_1 can be set to "PCIe" or "SATA" and the M.2_2 can be set to "X2" or "X4". When connected to the first M.2 the fans of the card aren't spinning. When I connect it to the second M.2 it seems to work. The fans are spinning and the mainboard also detects a connected device. But it doesn't show up in SMOS.
Do you think it has something to do with SMOS? I have no Windows to try out
Any help is greatly appreciated! Thanks.