My hardware is a Dell T30 (outlet buy @ $299) running 1.0.2 BIOS booted to WD Black 256GB M.2 PCIe NVMe Solid State Drive – WDS256G1X0C
A warning regarding the Poweredge T30 BIOS -- onboard M.2 support is disabled on BIOS versions after 1.0.2 (thanks Dell! ).
Geekster Owl lays out the problem and the fix:
Basically you should upgrade to the latest BIOS to patch security holes, then downgrade to re-enable M.2 support on the motherboard.
Old BIOS versions for the rollback can be grabbed from here:
New BIOS versions are here:
Hope this helps.