From everything I read including here Now available: Free NVMe RAID upgrade for AMD X399 chipset! there should be no problem using 3 drives.
It lets me make a raid 0 with 2 drives but it wont let me do anything with 3.
Any suggestions? Did I miss something?
FYI I'm using the Asus ROG Zenith Extreme MB on the latest BIOS.
Thank you everyone in advance for your help.