Availability of XO-1.5 ATest-2 machines

Richard A. Smith richard at laptop.org
Mon Jul 20 00:37:21 EDT 2009

Carlos Nazareno wrote:

> Also, what determines the dynamic clock rate from 400MHz to 1GHz? Is
> this auto-scaling on demand like with the old AMD Athlon64's? Does the
> software automatically reduce speed to 400MHz when the unit is
> unplugged?

Dyanamic clock scaling is usefully for thermal limits only.  Scaling 
back the clock to 400Mhz will cost you power not save it.  Power savings 
  are achieved by running as fast as you possibly can and then entering 
one of the lower power states where the clock is stopped.

Richard Smith  <richard at laptop.org>
One Laptop Per Child

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