You can use apm. It will only save a few watts, but it may reduce the
cooling costs by reducing the heat generated by the CPU. If you have
_many_ machines you can easily reduce the temperature of the server room
by a few degrees C. 

  Advanced Power Management control
  https://calomel.org/apm_control.html

--
   Calomel @ https://calomel.org
   Open Source Research and Reference


On Fri, Feb 05, 2010 at 11:37:16AM -0500, Jean-Francois wrote:
quoted text
>Le vendredi 05 fivrier 2010 11:17:51, vous avez icrit :
>> On 04/02/2010 23:02, Jean-Francois wrote:
>> > All,
>> >
>> > I am looking forward to reduce the TDP for a server planned to be built.
>> > As low as possible shall be best, is AMD cool'n quiet operating with
>> > latest OpenBSD ?
>> >
>> > Regards
>>
>> Depending on what you where looking at, you can reduce the voltages (if
>> your BIOS has this much control) and this will lower power/heat. I've
>> done this on PC's with bad HSF in hot temperatures. Though, like over
>> clocking, it's an art that requires testing, trying and patience to find
>> the lowest/highest while still being stable
>>
>
>Hello,
>
>I think of doing this too.
>What I would like to understand is if I will be able to use the frequency
>change 1000 / 2000 MHz dynamic load based.
>
>Regards