I have a XFX5970 BE with that kind cooler and is excellent. The only problem at least what i have face it was that the VDCC(Voltage contoller) cooling is BAD and i mean BAD with that cooler. In order to get some more juice out of your card you need to increase the voltage a little and by the time you start doing this you will see your VDCC reaching 90-100 degrees Celsius (120 is the limit for mine). If really need to boost that think with safety use water cooling and read a lot guides around the net a lot of people have already try it some with success and some with failures. Good luck and boost that think. (Post some pics).