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I have dual boot Ubuntu 12.10 and windows 8 on a Dell XPs8300 PC I can't use Ubuntu because the noise, even without doing anything I can hear the fan noise It could be the graphic card drivers which in windows displays a AMD Radeon HD 6700 series and in Ubuntu Under Additional Driver displays as Radeon HD 5700 series (displays in green)

It was working fine in Ubuntu 12.4.1 and it works fine in windows 8

I have tried installing drivers (Video driver for the AMD graphics accelerators from fglrx) & (Video driver for the AMD graphics accelerators from fglrx updates ) and it is the same, very noisy and after installing these drivers the side bar and system drop down menu are not available

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