X99 doesn't see 2x ssd yet the OS does

DMG5760

Reputable
Jan 9, 2016
105
0
4,690
I have a ssd as the boot drive then formatted it using the disk manager so it is unpartition space same as the new one when I go to set them up as a raid it says no a available drives. When I plug each in seprit lay it showed up in the bios and when I plug them bolth in it only looks like it sees one but if I boot to the OS from a 3rd hdd Windows 10 sees bolth SSDs and I can choose to make partitions and such

Motherboard x99 deluxe