I have seen several cards that will do up to 4 NVMe from a single x16 slot (with MB and CPU that support bifurcation), but I have only found cards that are 1 PCIe slot to 1 M.2 A+E....
Asus sells these cards, but the motherboard needs to support 4 way bifurcation. Most only support two way. There’s definitely double nvme cards that have a wider compatibility
Do PCIe bifurcation cards with 4 M.2 A+E slots exist?
I have seen several cards that will do up to 4 NVMe from a single x16 slot (with MB and CPU that support bifurcation), but I have only found cards that are 1 PCIe slot to 1 M.2 A+E....