PCIe Riser Cable to use the PCIe slot under the GPU?

What is the difference between PCIe Gen 3 and PCIe Gen 4? does the pcie slot matter for gpu PCIe x16 slots are associated with graphics cards and provide the highest bandwidth available on a standard consumer motherboard High-end gaming does ritual casting use a spell slot The type of interface, such as PCIe slots, on the motherboard determines the speed and bandwidth at which data is transferred between the graphics card and the

does ddr3 fit in ddr4 slot Sticking with PCIe Gen 3 is acceptable for any previous series of GPUs or accessories due to the bandwidth capabilities for gaming Looking