Not that system as such.
You can undervolt and underclock the CPU by going into the bios though.
I find as soon as the cpu use jumps over 1% cool n quiet or Speedstep cuts in and pushes the cpu up to fullspeed.
For a small file server or box to simply connect to the net for LEGAL USE, you can simply underclock and undervolt the CPU to reduce power use.
600 to 800 Mhz should be all you need to run that box at, and depending on the CPU stepping, you should be able to drop the Vcc by about 0.1 to 0.2 volts, from the default.
I hope this helps.