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

Just by looking at the picture of the board on the linked website, the second slot says PCI 16_2, which would say to me that it's a PCIe 3 x16

The PCIe cards are available in different sizes and rated as X1, X4, X8, X16 The smaller cards will fit perfectly in the larger slots but not vice-versa So,

does it matter which m2 slot i use It's got a PCIe Gen5 GPU slot, so you could install a next Expansion slots: 1x PCIe Gen4 x16 Video ports: 1x HDMI

does lucky devil slot pay real money EXPLAINED: PCIe lane SWITCHING & Biggest MISTAKES!