Thread: Jolla Sailfish Is stunning! Now on video!
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switch-hitter is offline switch-hitter
2012-11-21 , 15:42
Posts: 207 | Thanked: 552 times | Joined on Jul 2011
#114
Originally Posted by tortoisedoc View Post
Good point; also dual core === more battery drainage.
"...why go with a multi-core system? The answer is simple and not necessarily obvious: energy efficiency. You see, a processor running at a faster speed needs a higher voltage than one running at a lower speed, and the relationship between voltage and actual power used is not linear, but rather squared. For example, if a theoretical CPU requires 2 volts to run at 500MHz, but 4 volts to run at 1GHz (1000MHz), then the CPU requires 4 times as much power to run at 1GHz than it does 500MHz - not twice as much. As a result, two processors running at 500MHz and 2 volts might use up 4 units of power per hour for 1GHz of effective processing power, but a single processor running at 1GHz and 4 volts would require 8 such power units to do the same thing. These numbers were chosen to make the match more obvious, but the end result is that 1 processor at a given speed will use more power than two processors running at half that speed."

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