> Is power consumption directly related to clock speed in some way?

Pretty much always.  On the digital side of things transistors use most 
power whilst switching (as opposed to being in steady state on or off), 
so the more switching they do per second the higher the average power 
consumption.  On the analogue side the details probably vary depending 
on exactly which DAC architecture you're using, but in general I can't 
imagine power going down at higher clock speeds.  Higher clock speeds 
mean faster rate of change of voltage, which usually means higher 
currents are involved, so more power gets dissipated in various components.

Post a reply to this message