back to article Overclocking for servers

Bring up the topic of overclocking to the major system manufacturers and you hear a variety of responses ranging from ‘we’re plenty fast enough now – take a look at our _____ (insert benchmark here) that’s enabled by our use of ___________(insert techno feature here)” to “it’s just not safe, son, and our customers need to be …

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  1. Sutekh

    Oh no!

    How long before intel locks all but their highest spec processors down again?

    this idea has come far too late

  2. Anonymous Coward
    Anonymous Coward

    Power

    Overclocking means the CPU will use a lot more power - up to a point where the flops/watt is dropping in efficiency. This is very important in supercomputing, less so in a single gaming PC so not quite the same thing....

    http://www.xbitlabs.com/articles/cpu/display/power-consumption-overclocking_15.html#sect1

    Having said that IBM already do this with the latest Power7 machines - you can turn off half the cores and have the other half running very fast (overclocked) where single thread performance is important.

    1. Ammaross Danan
      Boffin

      Not True

      Some processors are able to get a stable 200Mhz-600Mhz OC with no voltage changes. At the +600Mhz end, sometimes the voltage increase need only be +0.01V. Fairly marginal power draw increase (check the Q9505 in your link). Of course, the article need not say that the OC be from a stock 2.4Ghz up to a 4Ghz OC. Likely, they'll push a +400Mhz or so to keep power draw down in a sweet spot. However, if companies are willing to refresh their entire server setup with highest-end premium parts every year, paying a higher power bill might be the least of their concerns.

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