A x1 PCIe card can be detected in pcie x16 slot?

A x1 PCIe card can be detected in pcie x16 slot? x16 slot It means the card will fit into a single PCIe x16 slot, but the card is as wide as two cards and will take 2 slots at the back of the case x16 slot So, there is no singular PCI Express slot There are actually four sizes : PCI Express x1, PCI Express x4, PCI Express x8, and PCI Express x16

x16 slot It's a slot of x16 size but electrically x4 This

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