HP Probook 4530s overheating problem (ati/radeon)

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http://askubuntu.com – Well, this is a painful topic, because I see, that graphic card developers don't want to support Linux environment with their drivers. I have HP Probook i5-2430M CPU, ATI Radeon HD 6490M/ Intel HD Graphics 3000 and 4GB of RAM. I tried different drivers but when i do simple tasks, my PC is overheating and CPU temperature goes between 70-80 degrees Celsius. While working on Windows, nothing gets hot while doing the same tasks. Has anyone found any solution for this? I assume that switching to Intel Graphics could reduce the temperature, but then my Radeon gets useless and thats no good. (HowTos)