cpu energy comsumption tool

[tubbie]

Hi guys,
First of all, thank you for all the work you have done for reviewing the hardwares.
I have a home server running 24/7 (downloads + home entertainment) and it has a pentium 4 3.2 ghz prescott in it. Is there any tool I can use to analize the power consumption? Because I'm planning to buy a core 2 duo if this new cpu will lower the energy cost enough compared to the it costs.

Thank you in advance!

 

[m25]

Sisoft Sandra gives an approximation of the power currently used by the CPU but I don't think it can do more (display other parts' consume or make graphs about it).

 

[13thmonkey]

I would imagine that the savings are on the order of 15-20watts. If we take 20 as a best case scenario you'll be saving 1 unit (Kwh) of electricity every 50 hours, round it to 2 days.

So in a year you'll save about 175 units of electricity, one third of which might be on 'cheap rate' for over night usage. Assume that a unit costs about $0.10 / unit and you are looking at a saving of $17.

None of these figures are accurate, but they are probably close.

So no it probably isn't worth it...