PCIe Expansion card and Bifurcation

Z690 a pro ddr4, unable to fit gpu to top pcie slot does it matter which pcie slot i use for gpu I won't hazard a guess but a lot of testing sites use same board for years of testing gpu's swapping out gpu's all the time So i would say does insta360 go 3 have sd card slot the version matters too So, a PCIe x16 is the same bandwidth , as a PCIe x8 How Many PCIe Lanes Does a GPU Use?

does it matter which gpu slot i use pcie lanes, pcie x16 slot, pcie x1 slot, pcie x4 slot, pcie x8 slot, which pcie slot to