How fast is PCIe NVMe vs PCIe

PCIe gen 3 and PCIe gen 4 generally have the same loading time for windows However, how data is read and written between the two might be a lot

My questions are: 1 Is the PCI-E NVME SSD compatible with my Z390 Godlike MOBO which has PCI-E slots? 2

nvme in pcie slot Depends on the device you're using in it It'll surely be a bottleneck if you're using a PCIe or card in a PCIe slot Simply because

nvme m2 ssd slot PCIE X4 has 2000 MBs of bandwidth available, but version has more overhead than