How to change the number of PCIe lanes

how to know videocard slot type pcie slot width Not to be confused with the length of motherboard PCIe slots , the GPU slot type refers to how many PCIe slots a pcie 40 gpu in 30 slot ; Motherboard via one of: PCIe ×4; PCIe ×4; PCIe ×4; Serial ATA · USB · Intel · Phison · Realtek · Samsung · Silicon Motion · SK Hynix

pcie slot meaning A x1 electrical card in any compliant PCIe slot will always run in x1 electrical mode The link width provides a measure of the data transfer