If a board disables SATA3 ports when an M2 slot is used, will ...
The motherboard M.2 slot #3 shares bandwidth with SATA 6.0 Gb/s ports. When the M.2 slot is populated, two SATA 6.0 Gb/s ports are disabled.
How to determine which M.2 slot a SSD is connected to.
Instead, they are plugged directly into the motherboard with a dedicated M.2 connector slot.
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Motherboard » X570 Motherboard with Maximum M.2 Slots.
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