1x motherboard. SATA2 will be unavailable when installing M.2 SATA SSD in the M2_2 slot. SATA5 & SATA6 will be unavailable when installing M.2 SATA/PCIe SSD in the M2_3 slot. M2_4 bandwidth will switch from x4 to x2 when PCI_E5 slot is inserted.
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