Ah that is very interesting because i have exactly that problem! One stick is off and the other stuck in rainbow. I gave up on it in the end but wonder if that's part of the issue. Have you seen the massive thread on it over at the g skill forums? It looks like different software accessing the bus as the same time is causing huge issues.
What's the easiest way to validate whether you have some suspect SPD profiles?
Yes, that's it.
![Frown :( :(](/styles/default/xenforo/vbSmilies/Normal/frown.gif)
Check out this link. I paid for the software, £15. It did fix my second set of sticks, i think my first were beyond saving.
https://www.whiskey-foxtrot.com/2017/05/12/corrupted-spd-on-trident-z-rgb-restore-it/4/