I finally decided to (re)put my old 9800pro instead of my temporary fx5200 and test the 8.01 driver. All works fine, except that dam compiz that dont want to work because a 2048x2048 texture limitation and i'm on a 2560x1024 big desktop. After searches I read it's an hardware/capacity limitation of my graphic card.

So my question is simple : is there a way to get through the 2048x2048 3D limitation of my radeon 9800pro ?