I mean, did you try to uninstall TriXX completely from the system?
You never know what these programs are doing in the background...
Edit: I tried TriXX myself and it wasn't interfering with GGS on my dev PC...
I might have to make GGS more persistent with overclocking settings.
tried that too just now, no change. i looked deeper if uv works. at least for my rig it dont work. i thought maybe ggs cannot override hardcoded voltage so i reflashed bios to stock voltage settings, but it dont go below 930-940mv