I'm using these:
#!/system/bin/sh
echo '122880 800' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '245760 850' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '368640 850' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '460800 900' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '576000 900' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '652800 900' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '768000 950' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '806400 950' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '921600 950' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '1024000 975' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '1113000 1000' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '1209600 1050' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '1305600 1075' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels
echo '1401600 1125' > /sys/devices/system/cpu/cpu0/cpufreq/vdd_levels