Saw this but not sure what it mean...
http://forum.asrock.com/forum_posts...msung-950-pro-m2-not-recognised-z170-extreme7....
Quick answer for you: First, find the CSM option, at the bottom of the Boot screen. If it is Enabled (default), find the Launch Storage OpROM Policy sub-option, and set it to UEFI Only. Or if you know how to install Windows for UEFI booting, set CSM to Disabled.
Next, when installing Windows 10, select a Custom installation and select Load Driver. Have the IRST 14.6 "F6" driver on a USB drive, which you browse to and is then loaded by the Windows Installer. When complete your NVMe PCIe SSD RAID 0 volume should be visible to select for installing Windows 10. It is NOT required for the RAID volume to be included in the Boot order list in order to be found by the Windows 10 Installer. The same is true for a SINGLE PCIe SSD.
If you are looking for a Boot entry of "950 Pro", you won't be seeing that. If you have an entry called "Windows Boot Manager", that is your 950 Pro. Actually, you should see both of those entries on one line. If not, you've done something wrong.
If you think a BIOS update is necessary... I'm sorry but do you really think you are the first person to have ever used a NVMe SSD on a ASRock Z170 board? Read on please.
I'm sorry there is no documentation regarding the behavior of PCIe SSDs of AHCI or NVMe protocols in the UEFI Storage Configuration screen and others in the UEFI.
Don't expect these SSDs to be listed the same way as SATA drives are in the UEFI, or what works for SATA drives to also work for PCIe SSDs. Some things won't work the same at all.
We are now working with multiple different storage protocols used at the same time on a computer platform (PC) that was really not designed to accommodate that.
When Samsung first released their first PCIe SSD, the XP941, they did so ONLY to OEM PC manufactures. They were never meant to be sold at retail, and never appeared among Samsung's retail SSD product listings. The next model, the SM951, was also not a retail product.
Now we understand why.
They are not plug and play devices, and require special configuration, BIOS options, and Option ROMs (part of a BIOS/UEFI). Samsung had control over this with the OEM manufactures. Once they were retail products, the owner is on their own, whether they knew it or not. Meaning does their mother board and its firmware support these SSDs.
It is true that recently both of those Samsung PCIe SSDs were sold by a few retailers. We now have the first true retail version, the 950 Pro. What hasn't changed is these SSDs are not simple plug and play drives, particularly when used in RAID.
BTW, the Intel Z170 chipset and IRST 14.6 software are the first official hardware and software that supports RAID 0 with PCIe SSDs. It is far from perfect yet and is not anywhere near as stable as it is with SATA drives.
WARNING: If you clear the UEFI/CMOS or update the UEFI to a new/different version, both of which set all UEFI options to their defaults, the RAID 0 array will fail and cannot be recovered.
That is not simply a case of booting the PC in AHCI mode, I wish it was. I learned this myself as every UEFI clear caused my RAID 0 volume of SM951s to fail. Other users confirmed this behavior.
I highly suggest installing Win 10 on a SATA drive in RAID mode, and then experiment with RAID 0 and your 950s. I would never suggest creating your first PCIe SSD RAID 0 volume for a Windows installation.
