I have no experience of PCIe slots so am somewhat lost trying to follow the Asus manual. I have a Nvidia 850 graphics card fitted but nothing else on the motherboard.
I have reviewed my needs and found that a 512GB Samsung 950 PRO, M.2 (22x80) PCIe 3.0 (x4) NVMe 1.1 SSD will fit my board and is a higher spec.Thanks for your helpTed