@Fernando:
Thank you for the answer.

I've attached the file. can you check.

@Fernando and @Lost_N_BIOS

Thanks that you both answered me. I'm new here forum. Here is pics from my BIOS CSM and other settings.

I can't find UEFI WINDOWS BOOT tool or PATA SS or other disks only disks which are old of my computer.

I also now try to make linux USB boot drive https://superuser.com/questions/1378031/...GHwOG3-HsjUiuCI

Because modded bios don't find NVME...

Windows USB installing stick find NVME and installation works perfect.. problem is booting to installed win 10 which is installed to NVME drive.

@Fernando Intel volume 0 is 2x 256Gb Samsung SATA 3 SSD RAID 0 system volume.
I flashed bios with mainboard own BIOS flash button backwards at my mainboard&computer case (Attachment pic of this message)
Modded bios is from here :
[Request] Asus P9x79 BIOS with NVMe support

I have P9X79 motherboard.

If bios don't work I think that boot from USB stick to NVMe is ok too to me. I would be glad if some way I can boot to windows 10 which is installed to NVMe :)

@Fernando

1. I'm not sure is OS installation successful, but Windows 10 installing USB stick can detect NVMe disk here attachment pics you can see more information from it who it detects NVME and NVME disk partitions. Windows 10 installation made those partitions to that NVME disk.
I quess it's successful. perhaps I'm wrong

2. I used ASUS USB Flashback button of course with USB stick when I flashed new bios. When I flashed modded bios then CSM options came available to BIOS. But those options I have tried all settings and BIOS don't find NVMe.

@Fernando

Also Windows 10 USB stick detects that Windows 10 is installed according to this message attachment pic ?

@Fernando Yes I used ASUS USB flashback update when I updated modded new bios to my computer.

I have also unplugged all my harddiskks and try to Install windows and I changed SATA controller setting from BIOS also from RAID to ACHI at bios but those don't have effect. NVME couldn't find with bios. I have tried many settings last week.

That's why now I try also to make USB stick boot which load drivers to NVME. It's okay if boot is not fast because I want NVME speed to games.

@ peikko763 - All BIOS there are fine, and correctly modified for NVME usage and tested by many users, so the issue must be your setup or BIOS settings etc.
Leave CSM enabled as you have, but on Boot >> Secure Boot Page >> change OS Type to Windows UEFI Mode. Do a clean install, with no other SSD/HDD drives connection, no other USB either other than one you will install windows from.
Delete all partitions on the NVME, make it "RAW", then Initialize your USB stick to GPT, then format and put your Win10 install media on there, then do install to "RAW" NVME

@Lost_N_BIOS

Windows 10 usb stick is GPT. I have installed win 10 many times with unconnected all other drives to computer(hard disk and others power off).
I try today later change secure boot page settings to Windows UEFI mode.

Thanks for help.

@peikko763 - Since you've done install so many times, be sure to delete everything on the NVME and make it a RAW disk (not already GPT nor partitions etc)
You can do that with diskpart from CMD prompt (May need to be Admin CMD prompt, I can't remember if that is required or not.
If it is, here is simply registry edit that adds "Open command window here as Administrator" to the right click menu for Win10 (Win7 you can just select any folder, hold shift and press right click, choose open CMD as admin here)
Double-click to install, reboot after install may be required
http://s000.tinyupload.com/index.php?fil...134606820377175

Diskpart >> List Disk (identify NVME by size)
Diskpart >> Select disk # (make sure you select your NVME)
Diskpart >> Clean
Done >> Shut down OS and remove main OS drive, and all drives except USB install and NVME, then make your BIOS changes and try again.

You're welcome, hopefully you can get it sorted out

Yes, that secure boot >> Windows UEFI mode setting is required, so if you weren't changing that before this is what was stopping you previously

Does anyone know here how I can make USB bootable NVME driver boot disk to X79 motherboard ?
Here is instructions to X58 but does not work with my mainboard.

I want to try it if this works. I'm glad then.

[Guide] NVMe-boot for systems with legacy BIOS and older-UEFI (DUET-REFIND)

-------------

@Lost_N_BIOS and @Fernando Now my computer boots to NVMe

Thanks for help.. Now enjoying faster SSD :)