Can You Use a PCIe Express Card In a Slot?

I don't see a problem with the first 2 cards, but I'm wondering if the 3rd card will work as well? Given that PCIE is twice the bandwidth of

2 NVMe solid-state drives, for a total of 32TB, into a single PCIe x16 slot without needing additional drivers High-Speed Storage The PCIe x16 host

m2 nvme slot As with previous generations, the standard simply doubles the speed that the PCIe slot runs at It now provides about 2GBs per lane

m2 pcie 40 in 30 slot Current motherboards have multiple slots Some of those slots share PCI lanes with the PCIe slots In the one you mentioned it appears that