Setting boot drive as NVMe M.2 ssd 970 evo samsung BIOS wont let me select it as Boot drive

Samsung software/drivers don't play nicely when BIOS is set to RAID.

We need more info:

1. How did you change BIOS to AHCI? You just can't change BIOS without preparing Win 10 for the change first. Otherwise it won't boot.
   
   
2. What was the OS on originally, an SSD or a HDD?
   
   
3. If the OS was on a HDD, did you unplug it from the SATA port on the motherboard before attempting to boot from the new SSD (with Win 10 on it)?
   
   
4. Have you tried booting from the new SSD via the F12 boot menu?
   
   
5. You don't want to change the boot sequence in BIOS, except to make sure that Windows Boot Manager is first on the boot list, not the SSD.
   
   
6. Have you tried imaging, instead of cloning, the "source" drive using Macrium and saving it on an external HDD. And then use Macrium to move that image onto the new SSD?

Bios is not a boot selector/manager.

The BCD must be for ONLY the 970

Samsung 970 drives in particular do not conform to windows AHCI so they have their OWN driver for M2.

Cloning is not supported by  Dell or Microsoft.

This has been the policy since windows NT in 1995.

https://docs.microsoft.com/en-us/troubleshoot/windows-server/backup-and-storage/windows-installations-disk-duplication#

* Notice : The driver supports Windows 7, Windows 8.1 and Windows 10.
Recommended minimum system configuration is Intel Haswell Refresh Processor, 2GB RAM, 50MB free disk space and UEFI Bios v2.3.
* secure boot OFF for installation

@Ziggurath_8  - Are you saying the OS is on both the new SSD and on the HDD now? If OS files are still on the HDD, that's confusing Window Boot Manager so it boots from the HDD.  NOTE: If Windows Boot Manager isn't first on the list of boot options, make it so...

Confirm the PC can boot from the new SSD via the F12 boot menu.  Assuming it runs correctly after booting from the SSD, you should open Disk Management in Win 10 and initialize the HDD - ALL FILES WILL BE DELETED!*

After the HDD is initialized, restart Win 10 normally and it should boot from the new SSD, and the HDD can now be used for routine storage.

*If you haven't already done it, I encourage you to image the HDD with something like Macrium Reflect (free) and save that image on an external USB drive before you initialize the HDD, to be safe.

After you initialize the HDD, you can use Macrium Reflect to "mount" the image saved on the USB drive and assign a drive letter so you can copy all your personal files/folders out of the image and onto the initialized (empty) HDD. Don't copy any Windows or app files from the image onto the HDD.

And then Move Win 10 default folders onto the HDD so you don't use space on the SSD.

Ok so now i got to install win 10 on the m.2 ssd with dell os recovery tool but it still dosent show anywhere as an option in the bios boot sequence and also in the f12 boot manager what do i do from there, i am starting to loose hope! It only show:

windows boot manager

UEFI: Wdc (my HHD)

Onboard NIC (IPV4)

Onboard NIC (IPV6) 

Why don't you just clone the existing HDD onto the new SSD? You can use Macrium Reflect (free). That way you won't have to reinstall all your apps again. Then use the F12 menu to boot from the SSD to make sure it works. And then you can initialize the HDD for storage. (See my post above.)

Otherwise, download the latest Win 10 ISO file (free) directly from Microsoft. That way you get the most recent version. Follow the instructions on that page to create a bootable USB stick. 

Next, disconnect the existing HDD from the motherboard. Then, with PC still powered off, plug the USB stick into the PC, power on and look on the F12 for option to boot from USB and follow the prompts. When you're sure it boots from the new SSD, you can re-connect the HDD, you will have to boot from SSD via F12 menu this time, and initialize the HDD for storage.

SOLVED

I updated the bios drivers and it worked like a glove after !