pcie problem: number of assigned data lanes randomly changes

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pcie slot function current PCIe Does the Intel DX79TO motherboard support x8 devices on PCIe x16 slots? 17 · PCIe x8 NIC in PCIe x16 slot

pciex1 slot But PCIe and PCIe are outdated Today, PCIe is For example, a PCIe SSD with four lanes can be inserted into a x16 slot