De resposta do ColonelONeill tirada de aqui :
For 32-bit Windows:
"C:\Program Files\ThinkPad\Utilities\PWMUIAux.exe" /HighPerformanceGpu /ShowDialog
"C:\Program Files\ThinkPad\Utilities\PWMUIAux.exe" /EnergySavingGpu /ShowDialogFor 64-bit Windows:
"C:\Program Files (x86)\ThinkPad\Utilities\PWMUIAux.exe" /HighPerformanceGpu /ShowDialog "C:\Program Files (x86)\ThinkPad\Utilities\PWMUIAux.exe" /EnergySavingGpu /ShowDialog
You still need Power Manager installed, as well as the switchable graphics driver package provided by Lenovo (not AMD/ATI or Intel).