I'm using Gentoo with the latest ATI drivers available (8.542, which is I think the 8.10 version...) and I have 2 questions :

* The catalyst control center offers in the 3D section, a "more settings" panel, where I can set "Catalyst A.I." to either "Standard" or "Advanced".
What's this ? When I set "Advanced", no more options are highlighted in the panel.

* The powerplay feature is not available for my HD4870. I hoped this way been able to downclock the GPU in order to have less noise in 2D ? Is powerplay the good way to achieve this ?

Thanks for the time you would have taken answering my questions