Is it okay to put Gen 3 SSD in my motherboards Gen 4 pcie slots?

PCIEx16 drops to x 8 when M2 SSD is installed??? can i use gen 4 ssd on gen 3 slot Kinda odd he spent nearly 4 minutes talking about the difference between Gen 3 and Gen 4 candy bar slot Should I Buy a Gen 4 SSD for My Gen 3 Laptop? Nikos Rentas•22K What are PCIe x1 Slots

canyonlands slot canyons Solved: Does installing gen4 NVMe SSD on PCIe 3 slot affect the speed? or should i buy 3 gen3 NVMe ssd? Please give me some advice