Berkeley CSUA MOTD:Entry 20366
Berkeley CSUA MOTD
2017/10/16 [General] UID:1000 Activity:popular

2001/1/18-19 [Science/Electric, Computer/HW/CPU] UID:20366 Activity:nil
1/18    Typically how much power does a desktop PC use?  I'm not talking
        about the max. rating written on the power supply.
        \_ CPU + monitor, 150-200 watts or so.  -tom
                \_ How much w/o the monitor?
           \_ Wow, I thought it was more like 50 watts or so.  In that case
              I'd better turn off all the idle machines here.
2017/10/16 [General] UID:1000 Activity:popular

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2009/2/15-18 [Science/Electric, Science/GlobalWarming, Computer/HW/Drives] UID:52576 Activity:nil
2/15    How many watts does a typical desktop (not counting monitor)
        use when it is completely idling (top shows at most 1-2% CPU),
        assuming normal SATA HD, video card, 2-4G RAM?
        \_ Google did a published study where they determined that the
           largest consumer of energy in a computer is the power supply
           itself. Figure that if you have a 400W power supply you are
2008/3/3-6 [Science/GlobalWarming] UID:49317 Activity:moderate
3/3     Photos of weather stations...badly placed weather stations.
        \_ Oh, so global warming is just caused by concrete?  I'm so relieved!
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2006/10/9-10 [Science/Electric, Science/GlobalWarming] UID:44738 Activity:high
10/9    So this whole plugin hybrid campaign thing...  Wouldn't that completely
        fuck the CA power grid if even a few % of drivers bought those?
        \_ the real issue is not rather CA power grid can handel it.
           I was told that if we modify it to make it plugin, it will
           drastically reduce the life span of the rechargable battery of those
           Prius, thus make the car a lot more prohibitive than it would
2006/6/15-17 [Science/Electric] UID:43400 Activity:nil
6/14    I'm in S Cal and LA Dep of Water and Power charges me approximately
        $1.00 per 10KWH (KWH is 1000 watt hours). I don't watch TV at all,
        but my computer's on all the time. Suppose I do get a TV,
        and suppose I watch TV 4 hours a day and the TV is rated at
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2006/5/12-17 [Science/Electric, Science/GlobalWarming] UID:43031 Activity:nil
5/11    I bought a few expensive LED lightbulbs. Comments: when they say
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        Secondly, they look very very unnatural. With incandescent bulbs,
        you get various frequencies and things look natural. With LEDs,
2006/3/5-8 [Science/Electric] UID:42101 Activity:low
3/5     If an appliance is 220V, can I get an adapter or something for it
        because I have 120V? Thanks.
        \_ A transformer, yes.
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           large wattage tend to be very very big (size of couple bricks and
2006/3/6-8 [Science/Electric] UID:42116 Activity:kinda low
3/6     So where can I get a 120V->220V adapter? I'm thinking about buying an
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           than getting a transformer.  3000 watts is too serious of an
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2006/3/1 [Science/Electric] UID:42041 Activity:moderate
3/1     Say I have a circuit breaker that says 20A. How many watts can I load
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        \_ P = VI  where P is power in watts, V is voltage in volts, I is current
           in amps (A).  Wall socket voltage is a max of 120V in the USA and is
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2006/2/18-23 [Science/GlobalWarming] UID:41917 Activity:nil
2/18    Back in 2000 I bought a few 23W energy efficient bulbs that
        output 100W, and a few 16W bulbs that output 60W. The
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        few more bulbs from Walmart...  7W bulbs that output 40W,
        which has the (output/energy used) ratio of over 5.
        Are new bulbs getting more and more efficient?