Having a similar issue with my Crosshair Hero VII Wifi. Issue is compounded, I believe, due to being afflicted by the iCue/CPUID crash issue as well:
Latest BIOS versions lock out Vengeance Pro RGB control completely. They don't even show up in iCue. Tried rolling back to 0804, as many were stating that version worked for them. Worked for a bit, then back to crash issues (black screening.) Per the black screen threads, renamed the CPUID dll's in iCue, then they went away again. Guessing that the RAM is controlled via CPUID, which would explain it disappearing as soon as I rename those dll's.
If I had to choose, of course I'd rather have a stable system than controllable RGB RAM (especially since I have one stick that seems to randomly lag behind the rest, not much, but enough to send my OCD into overdrive.) That being said, if I could get both to work I would be a very happy camper indeed.