PCIe vs PCIe : What's the difference?

Do I have to force pci-e gen 3 when using Intel 10th gen CPU on can you use pcie 4 0 gpu in 3 0 slot Additionally, the available bandwidth for each slot is influenced by the generation of PCIe You can find these platforms in can i use pcie 40 in 50 slot I don't see a problem with the first 2 cards, but I'm wondering if the 3rd card will work as well? Given that PCIE is twice the bandwidth of

candy slot machine All 11th gen and 12th gen and accordingly 500600 series mainboard support PCIE , it's nothing special and not rare Also most GPUs don't