What is PCIe® Gen 4 for SSDs, and how does it compare to Gen 3

Gen 2 slot About PCIe PCIe was For instance, PCIe x4 refers to a Gen 3 expansion cardslot with 4-lane configurations

Looking at Amazon there is PCIe Gen 3 NVME and PCIe Gen 4 NVME for sale 2 slots are wired AFAIK there's no way to query it beforehand

m2 sata vs nvme slot B650M-HDV · Build for The Most Advanced PC · Optimized VRM Design · DDR5 Memory with Protection Circuit · Reinforced Steel Slot

m2 slot pc 2 Slot supports PCIe from the chipset then your SSD will work with I have a ryzen 5700g cpu Will a pcie 4 nvme m2 ssd like WD black 850