PowerMizerEnable not working in Linux

Option “RegistryDwords” “PowerMizerEnable=0x1; PerfLevelSrc=0x2222; PowerMizerDefault=0x3; PowerMizerDefaultAC=0x3” in xorg.conf not working now. Everything worked in version 525.89.02. Doesn’t work with new drivers. How to make it work?