The ATI Radeon HD 4850 and 4870 are certainly delivering excellent performance, but the heat level of the cards is somewhat alarming. A utility to manually control the fans has been created by bretware, a forum user at Guru3D.
There are only a few simple steps needed to get manual fan control working:
One of our forum members, Iceman0124, is seeing load temperatures top out at less than idle temperatures with the auto-fan control, manually setting the fans to 55% speed. See the thread for more information.
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