Can I use a Gen 4 NVMe SSd in a Gen 2 slot?

2 slot is suitable for PCIe NVMe SSD with interface 2 A Standard PCIe slot

The NVMe PCIe card allows you add PCI-e NVME SSD to your motherboard without slot, perfect solution for PC upgraded 【APPLICABLE

pcie 40 in 30 slot 2 slot You can see two standard slots on the PCB, between the PCIe slots These have the mounting holes for horizontally mounting

pcie x32 slot is a slot that can interface with SATA , PCI Express