Asus Z170-A - PCH Configuration; PCH Storage Configuration

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Chapter 2: BIOS Setup
2.6.4 PCH Conguration
PCI Express Conguration
This item allows you to congure the PCI Express slots.
PCIe Speed [Auto]
This item allows your system to automatically select the PCI Express port speed.
Conguration options: [Auto] [Gen1] [Gen2] [Gen3]
2.6.5 PCH Storage Conguration
While entering Setup, the BIOS automatically detects the presence of SATA devices. The
SATA Port items show Not Present if no SATA device is installed to the corresponding SATA
port.
Scroll down to display the other BIOS items.