With KMS, it doesn't do anything.What does the ForceLowPowerMode option do? After enabling it I still see with rovclock that the core and memory clocks are at their maximum values...
With UMS, it halves the clock speeds, I think.
Last time I looked, rovclock did not take into account the post divider. Also, rovclock only works on legacy radeons, (r1xx-r4xx).
I probably should have posted in another thread to avoid confusion: my card is an R300. I just thought ForceLowPowerMode also worked for legacy cards. Should owners of these cards keep using rovclock then?
Stupid $^$^&% edit limit. If the post divider is initially set to 1 and you half the engine clock, the post divider will likely be 2. since rovclock does look at the post divider, it will still report the old clock.
I can't say I fully understood you, but I take it that there are some technical drawbacks with using rovclock. The point is that if ForceLowPowerMode is just halving the clocks, that's a bit conservative, isn't it? This is, I use rovclock to set the core and memory frequencies to the values reported by fglrx in its lowest power settings, and those are 1/4 and 1/3 their original values, respectively.