Optix Prime related crashes

areg5

I was curious if anyone else has noticed this.  Sometimes my renders crash to CPU for no apparent reason other than Optix Prime.  Using GPU-Z I always adjust my scenes so they don't overload my GPU memory, so it's not an issue of overload in the case of my 980 ti's.  The 780 ti frequently isn't involved in renders of big scenes.  Anyway, it might render at full speed for a few minutes and then crash to CPU.  If I toggle the Optix Prime switch it works.  I've found this to happen if lets say it crashes with Optix x running, I switch it off and then it works ...but I've ALSO seen it happen if it crashes with Optix x off, and then when I switch it on it works.  It's a bit annoying.  Anyone else ever see this?