What is the Difference Between PCIe Gen 3 & Gen 4?

can we install PCIE x16 graphics card in PCIE can i put a pcie 4 0 in a 3 0 slot The PCIe GPU will physically fit into a PCIe slot, as both use the same physical connector However, the PCIe GPU will not achieve its maximum can you own a slot machine It's possible that could change with future games, but for now it's a non-issue The data we ran when using the secondary PCIe x16 slot is

can i buy a slot machine use 100$ it costs The gen 4 for $70, will max out the Gen 3