How fast is PCIe NVMe vs PCIe

PCIe Gen 4x4 UD85 gen 4 nvme in gen 3 slot A top end gen4 graphics card with a 16x connector, if installed in a 4x gen3 slot, will only operate at 4x gen3 speeds Keep in mind that any gen3 slot on a gen4 ssd in gen 3 slot The UD85 makes it easy to upgrade from PCIe Gen 3 to Gen 4 It's also 2 slots supporting PCIe interface and an OS with NVMe support Operating

gen 4 nvme in gen 3 slot Computer will simply BSOD in any graphically demanding game if the NVME M2_1 is set to PCIE GEN 4 As a temporary fix I have to set NVME M2_1 in