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PC clock skew

  1. Nov 16, 2009 #1


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    Anyone know what a typical clock skew would be on your average PC these days?

    Updating my clock with NTP it appears my laptop (when running 24h and not in idle mode) drifts about 2 seconds a day. I get the impression that's a lot. (John Harrison was building better mechanical clocks 250 years ago!)
  2. jcsd
  3. Nov 16, 2009 #2


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    1-2 second a day is about normal.
    That's about 10ppm for the clock crystal working over a wide range of temperatures, how much extra would you pay for a PC with a better regulated HW clock when you can sync to 20-30ms for free on the net/
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