1) Message boards : Number crunching : Buying another pc purely to crunch more wu's? (Message 43767) Posted 7 Nov 2004 by Charlie Tomberg Post: The cost of the new computer will not be your only expense. If you are going to use the new computer only for SETI, you should take into account the cost of electricity and potential for contributing to environmental problems. See this thread: http://setiweb.ssl.berkeley.edu/forum_thread.php?id=3810 . I would try to get a computer that uses the least electricity and is still powerful enough to be worth your trouble. Laptops generally use less juice than desktops. My laptop, for example, uses 35 watts, and my desktop uses around 150. After looking into this, I decided not to get a new machine, but I do keep my desktop on 24/7.

2) Message boards : Cafe SETI : The environmental impact and cost of running SETI@Home (Message 28380) Posted 20 Sep 2004 by Charlie Tomberg Post: > > thanks for your condideration. > > I meant thanks for your cinderdition > I mean consideration. (damdslexia) > regards, > Daryl. > Sorry about that. Is it OK now?

3) Message boards : Cafe SETI : The environmental impact and cost of running SETI@Home (Message 24401) Posted 10 Sep 2004 by Charlie Tomberg Post: > The climate BOINCers said if the monitor is off a computer averages about as > much electricity as a 60 watt light bulb. > > That seems quite low to me. I wonder what their source is?

4) Message boards : Cafe SETI : The environmental impact and cost of running SETI@Home (Message 23448) Posted 7 Sep 2004 by Charlie Tomberg Post: Thanks to everyone who replied to my post. It has been quite interesting to read your replies. Actually, I seem to have made some worst case assumptions in my original calculation. My computer's power supply can deliver 450 watts, so that was the figure I used. I realize that the actual consumption and the maximum can be quite different. Lets assume that my computer is actually using 300 watts / hour per mrvideo's suggestion. The highest tiered rate for elictricity in my area is ~$0.21 / kwh. The actual rate I was charged last month, however, was $0.13321 / kwh . So my original calculation was: ((.450 kw * 24 hours ) * 30 days ) = 324 kw / month 324 kw * $0.21 = $68.04 / month A more realistic calculation would be: ((.300 kw * 24 hours) * 30 days = 216 kw / month 216 kw * $0.13321 = $28.77/ month This is much less than my original estimate, but still significantly higher than the $15.00 that mrvideo calculated, due to the higher cost of electricity in my area. To get back to my original question, does anyone have any thoughts on how environmentally responsible it is to keep computers on all day just to run SETI? Whatever the cost to the consumer of the electricity - and in some areas that cost is the result of government subsidies or cost increase regulations - the electricity has to come from somewhere, and most of the electricity in the U.S. comes from burning fossel fuels (coal, natural gas, oil, etc.) or nuclear. The increase in power demand caused by SETI users is probably quite small - almost trivial - compared the total electricity used (and wasted), but it is not zero, so running SETI presumably has some impact on the environment. Any thoughts on whether it is worth it? What about for other BOINC projects like ClimatePrediction or Predictor@Home?

5) Message boards : Cafe SETI : The environmental impact and cost of running SETI@Home (Message 23002) Posted 6 Sep 2004 by Charlie Tomberg Post: I just did a power consumption calculation and found that running SETI@Home on my desktop computer 24/7 is costing me $50 - $75 per month. I use it for other tasks perhaps five hours per day. That's a lot more energy than I thought it would be using. Does anyone have any thoughts on how environmentally responsible it is to keep computers on all day just to run SETI? Also, I live in California's Central Valley where it gets quite hot in the summer, and air conditioners already stress the power system. And of course we had the energy crisis a few years ago. I am thinking of trying to set up a solar power system to allow my computer to run off the grid. Has anyone done this? Any suggestions on how to go about it? Thanks

6) Message boards : Cafe SETI : Sig test - ignore (Message 21673) Posted 3 Sep 2004 by Charlie Tomberg Post: test

7) Questions and Answers : Windows : Status for Climate Predictor ? (Message 19814) Posted 30 Aug 2004 by Charlie Tomberg Post: This link may be what you are looking for: http://www.climateprediction.net/newsb.php

8) Message boards : Cafe SETI : Sig test - ignore (Message 19618) Posted 30 Aug 2004 by Charlie Tomberg Post: test

9) Message boards : Cafe SETI : Sig test - ignore (Message 19615) Posted 30 Aug 2004 by Charlie Tomberg Post: test

10) Questions and Answers : Windows : Does anyone have Climate Prediction & SETI running together? (Message 19594) Posted 30 Aug 2004 by Charlie Tomberg Post: Has anyone managed to get Climate Prediction & SETI to run together on the same version of BOINC? After the Seti upgrade this should be possible, but does it work? Thanks.

11) Message boards : Cafe SETI : Sig test - ignore (Message 16490) Posted 23 Aug 2004 by Charlie Tomberg Post: test

12) Message boards : Cafe SETI : Sig test - ignore (Message 16488) Posted 23 Aug 2004 by Charlie Tomberg Post: test

13) Questions and Answers : Getting started : Changing the Resource Shares or pausing projects (Message 1712) Posted 25 Jun 2004 by Charlie Tomberg Post: I currently have two projects running: SETI@Home and Preditor@Home . Is there any way to pause the work on one of the projects or to change the resource shares once I have attached the project? If I use the "detatch" or "reset" options will I loose any credit I have earned for the project?

 
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