I have a Optiplex 7020 that I wanted to upgrade with a fast ssd.
Since the 7020 has a pci-e x4 slot, a M.2 PCI-e x4 for a NMVE SSD seemed the best option.
I bought an Asus M.2 adaptor and a Samsung 960evo.
I used Windows Media Creator to create a usb installation drive with Windows 10 for a fresh installation.
In Bios, I switched from legacy to UEFI.
Strangely enough, the NMVE did NOT show in Bios under boot sequence.
But it DOES show in System Info - PCI as Mass Storage.
Disconnected the SATA hard drive.
Booted from the UEFI USB, Windows 10 installation shows the ssd drive, format, install - lightning fast.
Reboot: harddisk not found!
In Boot Sequence, still no nmve ssd and/or Windows Boot Manager.
Secure boot is disabled.
I have the latest bios A13.
This chipset is UEFI and should support NMVE.
(And if it is a bios thing - whom at Dell do we need to approach to turn this on? ??