How to Identify PCIe Speed for a Device on Win10

How to manually change pcie speed? pcie slot configuration gen1 gen2 gen3 where as this gen 1 and gen 2 is only for troubled slot not able to run gen-3 and needs to be down grade to gen 1 or 2? may be I should go home pcie 4 gpu in pcie 3 slot No idea about power consumption, but I believe the Gen1 Gen2 Gen3 selection are for pcie lane width? fak whatever x1 pcie vs x4 vs x8 v x16

pcie slot pinout Socket Configuration ->VMD config for PStackN PCIE Slot Location Auto Gen1 Gen2 Gen3 Max Payload Size PCIE Max Payload Size Selection