PCIe x16 switching to x8 even if no 2nd GPU connected?

PCIe x16 switching to x8 even if no 2nd GPU connected? pci e x16 slot PCIe x16 devices are not compatible with smaller PCIe slots such as x1, x4, or x8 slots, but some motherboards may have PCIe x16 slots that are electrically pciex4 slot What are pcie slots uses, what are pcie slots, pcie slots explained, what are pcie lanes, pcie x16

pciex4 slot PCIe x16 Gen expansion backplane with two slots The PCIe x16 Gen3 backplane has two PCI Express x16 slots, with one slot supporting the OSS target

pcie slot The 'x16′ indicates the maximum number of PCI Express lanes supported and thus, the length of the slot As version , each lane provides The Matrox C900 PCIe x16 graphic card powers nine displays from a single board to easily build 3x3 video walls P690 Plus LP PCI Matrox P690 Plus LP PCI -