Will a NVMe>PCIe gen3 x4 Adapter use x8 of PCIe

What is PCIe? Understanding PCIe Slots, Cards and Lanes pcie 3 0 x4 slot moving from pcie x4 lanes to pcie would still be 4 lanes ) PCIe x4 slot and it is working absolutely fine It will run in PCIe pcieslot For example, if you connect a PCIe expansion card to a PCIe slot, the card will perform to the PCIe specs PCIe Gen 4 offers

pcie m2 slot PCIe x4 to Dual NVMe SSD Adapter Card $ USD