Anybody has any measurements of how much electricity does a Windows Home Server (say one of the HP models) use while being on 24/7?
I have an old PC running at home to store files that everyone can access from their laptops, but it is using too much power. I'm wondering if it would be worth to buy a WHS to replace it.
Kwh consumption per day or month is what i'm looking for, as rates vary from place to place.
Edit: Here are my conclusions, feel free to let me know if I'm not right.
An HP WHS with a 2Ghz Celeron (rated for 65W TDP) with only 2 HDD and 1 GB of ram could be well under 2 Kwh a day (The 2.4Ghz Quad Cored max TDP is 105W and was measured at 2.5 kwh per day with 4 HDD and 8GB Ram).
That's a saving of almost 3kwh per day against the old box that averaged 4.6 kwh per day (over 1000 kwh per year). @25 cents/kwh we pay here, that's about $275 a year savings in energy, meaning ROI is less than two years at current (likely to go up) electricity rates.
Now, there is also a new HP WHS with a 1.6 GHz Atom processor. I'll have to check its performance since that would mean even greater savings.
Edit 2: The Atom powered WHS (I researched one from HP and one from Acer) claim that load power usage is 26 watts and that they can go to sleep @ 3W and turn back on upon accessed automatically. @ 26w that means 0.6 kwh per day (meaning even faster at less than 1 year ROI).
Edit 3 (Jul 28): Got my hands on a Fluke meter with data logging capabilities and a clamp and took some samples over time of the power usage of my current PC. The average was 3.45 Kwh per day.