So I've been watching GPU-Z while just messing around in win7, doing trival things like dragging a window around, re-sizing, web surfing etc.. and I see that such small activities cause my GPU to run at max speeds. Completely idle, I see my gpu at 300mhz core and 150mhz memory. However the simple act of moving chrome/a window around or even scrolling down a webpage and the speeds jump to 900mhz core 1250 ram.
Is it normal for windows to use a gpu like that? I've tried with aero on and off, doesn't seem to make a difference other than memory usage, 63mb in win basic, over 120mb for aero. Seems kind of weird that a web browser needs such a modern gpu to be at max frequency
Alright I just tested it out - I opened up a web page with flash content and moved it around, while watching GPU Z my gpu clocks shot up to full speed. However doing that with toms website - the load was not much, but still noticeable (btw i tested this on Waterfox 10.0.2).
I also checked out the bus interface - and mine behaves exactly the same as well. I'm guessing it has something to do with some kind of automatic power saving (if the gpu is not under load, reverts to slower speed to save energy).