How are you getting on? Have you tried it without riser? What was the problem? I have one 16GB card that works fine at x16. I'm waiting for another 32GB card and another PCIe adapter with three fan outputs. What length of riser did you use?Just joined. I hope I'm ok to post here. I bought a 32gb sxm2 v100 and one if them 60 dollar adapter boards. It came in today. I've been pulling my hair out all night trying to get it to work. Thinking did I break it, am I an idiot. I'm a bit of a tech hoarder so I've had it in several machines. Finally it's showing up after swapping my x16 riser for an x8 riser. Any idea why? I know the x16 riser works.