513-51-N16W1- 1x M.2slot with THNSNK256GVN8. Motherboard KBL Drift_SK - BIOS ver 1.7
I'm upgrading the Standard SATA6 THNSNK256GVN8 SSD to the new 970 EVOplus NVMe. Thought this to be possible as previous poster, Viktors69, achieved this on 513-51
With bootable Acronis, cloned the SSD to NVMe (usb Plugable) and then booted into windows. NVMe is present in device manager and the partitions are mirrored, all good so far!
Then installed NMVe into the M.2 slot and boot but no bootable device found and BIOS information shows HHD model name and Serial no. = NONE and SATA mode = AHCI!
Do i need to install a NVMe driver (although recognised in windows!). There are later BIOS versions but I rather avoid updating at this stage as don't think it will fix the problem.
Will the NVMe work in AHCI M.2 slot?
Any help greatly appreciated, sorry about large images.

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Acer-Samuel