I just got a power usage meter as a gift and now, of course, am scrutinizing all my electronics to death . In any case, when in my MusicMonkey plugin and showing the (static) list of songs in Now Playing my PC uses ~19W. When I go into the MusicMonkey screensaver where it forces an update/redraw every second for the elapsed time, it jumps to ~37W which is pretty much the same usage when watching HD video. When I am using the built-in "FixedImage" NPVR screensaver, every time the image moves the usage temporarily jumps to ~30W and then goes back down.
Is there any conceivable way to improve the redraw "efficiency" or is it just the way it is? Note that in the MusicMonkey screensaver the CPU usage only goes up a few percent from when viewing the Now Playing list (~6% versus ~3%).