check this ( a bit old now)
http://www.notebookcheck.net/AMD-Rad...e.74305.0.html
and
http://www.guru3d.com/articles-pages...review,18.html
http://www.notebookcheck.net/AMD-Rad...e.74305.0.html
and
http://www.guru3d.com/articles-pages...review,18.html