PCIEx16 drops to x 8 when M2 SSD is installed???

PCIe gen 4 drive in a gen 3 slot? will gen 4 ssd work in gen 3 slot 2_1 slot on my ASUS ROG Strix x570i mobo The only thing I can find in bios is set to _1 link = Gen 4 Yet the SSD is still running at Gen 3 will a gen 4 ssd work in a gen 3 slot My laptop has a gen 3 slot First of all, I know that a PCIe 4 SSD NVMe will be running at gen 3 speeds and bottlenecked by the PCIe 3 slot But

will gen 4 ssd work in gen 3 slot Gen 4 SSDs aren't worth it unless you're working with large files and doing a lot of sequential readwrites