I manually turn up the speed on my fans to 72%. (bearing issue with one of them...which I just broke)
You can do this from the AMD Catalyst Control Center. There is a drop down on the left for Performance and then AMD OverDrive. You'll find the manual fan settings in there.
i did, i set fan speed to %80, however it didn't help. the lower side of card got too hot (upper side is cooler) and gpu0 got sick again.