I have an empty PCIe (X16) slot.
Q2: Can I put a X4 or X8 PCIe can in this X16 slot ?

Q1: What SSD's will work in this slot ?

Q3: Will it appear in the boot sequence of the BIOS when populated as at the moment PCIe is not an option.

Q4: what generation of PCIe is my slot? and what is the maximum Generation I can use. ?