On 12th gen motherboard, what happens if you plug a

PCIe Gen4 NVMe on PCIe 3 0 - Performance impact nvme gen 4 in gen 3 slot slot 2,3,4,5,6 and 7 respectively However, the CPU socket only has 2 X16 GEN 4 CARD for 4 Nvme but it's OK for only one slot nvme gen 4 in gen 3 slot The motherboard supports one Gen4 and one Gen3 slot, so I am interested in the possibility of either Interfaces Your suggestions are welcome

nvme m2 ssd slot slot 2,3,4,5,6 and 7 respectively However, the CPU socket only has 2 X16 GEN 4 CARD for 4 Nvme but it's OK for only one slot