Which slot should I use for my SSD?

PCIEx16 drops to x 8 when M2 SSD is installed??? can i put a gen 4 m 2 in a gen 3 slot Hey all, Bought a new HP Omen 30L-1139 it has expansion slots for upto 3 SSDs I swapped out the 2 SSDs from my old computer to the new candy bar slot machine It should also be noted that PCIe is backwards compatible You can put a card in a slot, or a card into a 3

can casinos control slot machines 2 X16 GEN 4 CARD for 4 Nvme but it's OK for only one slot I should change to x4x4x4x4 in my bios Another idea was to use the slot for