Currently on a fresh install of 12.10 with Unity and the newest AMD 13.3 beta 3 catalyst driver. But even when on the desktop with no programs open it seems to be idling at 25-30% GPU usage and 47-51°C.
I'm using the command "aticonfig --odgc --odgt" to check for the GPU load and temps.
Under XFCE and LXDE without compositing the GPU idles at 0-1% so I assume this is a compositing issue? But using 30% of a 7970m while idling is just crazy.