I have found that there are different versions of this computer, some use regular M.2 SSDS and some take NVME. Won't recognize the wrong type.

Went through something similar. Did you get it working? What I found is many of the Dell 3190's with the M.2 Connector with a "B Key" only support SATA drives and not NVME Drives. Most sites list that Foresee P900F as an NVME. Some show it as SATA so kinda confusing. 

Anyway, there is a setting in the BIOS to enable M.2 PCIe SSD's. You could try enabling that and see if it does anything? 

I had to get an actual M.2 2280 SATA Drive like the one in your other picture. Just a different brand. 

Thanks for replying,  jsuvman. AFAIK it's strictly a matter of NVMe vs SATA compatibility. These 3190s are not NVMe compatible. When I first posted I wasn't even aware of the difference. NOW I know! :) 

@ercost60​ That is what I found out too. There seems to be only one or two versions of the 3190 2 in 1 (not the regular 3190) that has a M.2 connector with an “M Key” slot that can use NVME. 

Now since I just recently did mine I left my BIOS setting on SATA. But the new SATA cards with both cutouts (B & M) can run on the SATA Bus or PCIe Bus from my understanding. So going to try that one day. Switching to PCIe in the BIOS to see if that will work as you should get better speed.

If it does not work, I will just switch it back. 

Unless you tried that already?

That is not what we found. We have some that are NVMe but will not take SATA, any GB size or mm drive size ( 2230 vs 2280). AND in the Bios it has that check box to use SATA... so not sure what is going on at All....