That atom processor is dual core. The four cores you might be seeing are from hyper threading. --sent from HTC Evo Shift <div class="gmail_quote">On Jun 20, 2012 8:22 AM, "Mike Rambo" <<a href="mailto:mrambo@lsd.k12.mi.us">mrambo@lsd.k12.mi.us</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Tom Schouten wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi List, Recently I've been doing some math and found out that running a 100W machine 24/7 at my parent's back home cost me about 150 Euros/year (Belgian electricity is quite expensive, about 20 Eurocents/kWh more than double of what it is here). The 100W was measured with power meter over period of 24h so is probably quite accurate. Includes PC, GB ethernet switch + wireless router. Anyone have an idea of how to replace this with something more power-efficient? </blockquote> I went with an atom board like Charles mentioned. I needed two ethernet ports so I went with the following board and the max 4GB of ram it supports. You end up with four CPU cores with this board. <a href="http://www.newegg.com/Product/Product.aspx?Item=N82E16813153212" target="_blank">http://www.newegg.com/Product/Product.aspx?Item=N82E16813153212</a> This one would also do if you don't need as many sata ports. <a href="http://www.newegg.com/Product/Product.aspx?Item=N82E16813153188" target="_blank">http://www.newegg.com/Product/Product.aspx?Item=N82E16813153188</a> The power supply in use is this one. The picoPSU requires a 12v source and thus your overall efficiency is influenced by the power brick used. I used a switching PSU from an old Gateway all in one that used external 12v power. <a href="http://www.mini-box.com/s.nl/it.A/id.417/.f" target="_blank">http://www.mini-box.com/s.nl/it.A/id.417/.f</a> I have two 2TB WD green disks for storage and one 40GB normal 7200 disk for services that prefer a little faster disk speed. Kill-A-Watt says my setup is costing me under $4 per month (at .13/kwh) which is down about $20/mo from what I was running before. I don't remember any more what the wattage of the setup is. I've looked more at the cost since the Kill-a-watt calculates it for me based upon the price I tell it to use. I do not have a CD/DVD attached full time. I used Centos 5 which loaded right up. I'd expect pretty much any other distro to do likewise. I first read about this kind of setup here. <a href="http://sandeen.net/wordpress/computers/linux/how-to-build-an-18w-4-terabyte-commodity-x86-linux-server/" target="_blank">http://sandeen.net/wordpress/computers/linux/how-to-build-an-18w-4-terabyte-commodity-x86-linux-server/</a> (note that the url above may be wrapped - it is one long string) HTH Mike _______________________________________________ linux-user mailing list <a href="mailto:linux-user@egr.msu.edu" target="_blank">linux-user@egr.msu.edu</a> <a href="http://mailman.egr.msu.edu/mailman/listinfo/linux-user" target="_blank">http://mailman.egr.msu.edu/mailman/listinfo/linux-user</a> </blockquote></div>