are they samsung drives ? believe with windows you need the intel driver for raid , isn't as good as samsungs own but if needs must .
if i can recall, need to install raid driver onto USB first, set RAID in bios and create the RAID drives then. when in windows, install the driver then roll onto install windows.
to be honest , you dont really need to Raid nvme drivers, plenty quick as it is unless is raid 1 or 10 your doing ?
sorry, you using Intel or AMD based system ?
your manual will also tell you how to create the RAID in BIOS before you roll onto the windows install
"C-1. Using EZ RAID GIGABYTE motherboards provide you with the EZ RAID feature, allowing you to quickly configure a RAID array with simplified steps. Steps: 1. After restarting the computer, enter the BIOS Setup and go to Peripherals. Press on the EZ RAID item. Select the type of hard drives you use for RAID in the Type tab and then press . 2. Go to the Mode tab to select a RAID level. RAID levels supported include RAID 0, RAID 1, RAID 10, and RAID 5 (the selections available depend on the number of the hard drives being installed). Then press to move to the Create tab. Click Proceed to begin. 3. After completing, you'll be brought back to the Intel(R) Rapid Storage Technology screen. Under RAID Volumes you can see the new RAID volume. To see more detailed information, press on the volume to check for information on RAID level, stripe block size, array name, and array capacity, etc"
"C-1. UEFI RAID Configuration Only Windows 10/8.1 64-bit supports UEFI RAID configuration. Steps: 1. In BIOS Setup, go to BIOS and set Windows 8/10 Features to Windows 8/10 and CSM Support to Disabled. Save the changes and exit BIOS Setup. 2. After the system reboot, enter BIOS Setup again. Then enter the Peripherals\Intel(R) Rapid Storage Technology sub-menu. 3. On the Intel(R) Rapid Storage Technology menu, press on Create RAID Volume to enter the Create RAID Volume screen. Enter a volume name with 1~16 letters (letters cannot be special characters) under the Name item and press . Then, select a RAID level. RAID levels supported include RAID 0, RAID 1, Recovery, RAID 10, and RAID 5 (the selections available depend on the number of the hard drives being installed). Next, use the down arrow key to move to Select Disks. 4. Under Select Disks item, select the hard drives to be included in the RAID array. Press the key on the hard drives to be selected (selected hard drives are marked with "X"). Then set the stripe block size. The stripe block size can be set from 4 KB to 128 KB. Once you have selected the stripe block size, set the volume capacity. 5. After setting the capacity, move to Create Volume and press to begin. 6. After completing, you'll be brought back to the Intel(R) Rapid Storage Technology screen. Under RAID Volumes you can see the new RAID volume. To see more detailed information, press on the volume to check for information on RAID level, stripe block size, array name, and array capacity, etc."