I've been testing the newest beta release and it seems that I can't set the powermizer feature in xorg.conf anymore. Before I used to have this fairly common line:
Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x3322; PowerMizerDefaultAC=0x1"
And lock the maximum frequency on the GPU, but that does not give me any effect anymore.
Since you could never save this with nvidia-settings, I now have to manually change this setting every time X loads. I also can't find any reference in the documentation about registrydword and barely any about powermizer!
X.org logs don't show any sign of it being ignored or accepted, and I can't find much information about it.