https://bugs.freedesktop.org/show_bug.cgi?id=49981

--- Comment #12 from graham grhm.perry@gmail.com --- Created attachment 67953 --> https://bugs.freedesktop.org/attachment.cgi?id=67953&action=edit proposed patch

Had a look round on google for some other profiles. Not entirely sure about cayman, as the idle is higher than on less powerful cards.