Internal hard drives, not boot drive, not showing up - power?

[markmcleod50]

I have 7 internal drives. One is my boot volume (m.2). The other 6 are former external drives that I reformatted and installed as internal drives. Only 3 of those mount. One of those will occasionally mount but not most of the time. This doesn't appear to be an issue with the drives themselves but something else. I've got a Corsair AX 760 power supply.

 

[hawkman]

Have you fixed this yet? My internal drives are not showing up either