Let's say you run BOINC at 100% CPU usage. By looking up you PC model number, looking in the manual or looking on the back of your power supply you should be able to find the maximum number of watts the power supply is capable of using.
watts per hour * hours per day * days / 1000 * Cost Per kW = $ Total Cost
kW = kilowatt, 1 kW is equal to 1,000 watts
This computers power supply is says it uses 240 watts per hour max and right now a kW cost about 15 cents.
So the cost of F@H for 22 hours a day, 350 days out of the year :
240 * 22 * 350 / 1000 * .15 = $277.20 per year (not including taxes and fees)
Or to run BOINC at 100 percent CPU usage 24 hours a day for this month (March) :
240 * 24 * 31 / 1000 * .15 = $26.78
Personally I have Folding at Home set to only use 11% of the CPU and BOINC set to use 10%. I don't want the PC working hard all the time nor do I want to hear the fan running all the time trying to cool the CPU down.
Running distributed computing programs at low settings lets me keep the energy cost down, keep the noise levels down and keep the amount of heat from the PC to a minimum.
- Please let me know if my math is wrong :)
