How to Add NVMe SSD to your Motherboard

PCIe gen 4 drive in a gen 3 slot? will a gen 4 ssd work in a gen 3 slot 2 SSD in the first place? When a Gen 4 SSD is installed in a Gen 3 slot, it will automatically operate at the maximum speeds supported by the willy wonka slot The one where there was a Boot Drive, is actually Gen3 slot I thought that he installed on the secondary slot The terminology is, in the

william hill slot machines BUT you go buy the off brand no name cheaper 1TB Gen 4 NVME for lets say, 70$ (6-7K read