[ubuntu] Problem with Powertop program

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http://ubuntuforums.org – Hey, I installed powertop because my notebook is overheating and somebody told me that i can optimize some settings using powertop. After changing Enable SATA link power management for /dev/sda it is a little bit better. Now i wanted to tune the Graphics Card powertop told me "BAD - Runtime PM for PCI Device NVIDIA ..........." I hit enter and know this entry is gone? Its not even marked with good?? Does it mean its fully tuned and that i dont have to tune it anymore? Another question is how i can reduce the power of my GPU to avoid Overheating. Powertop says: 100.0% PCI De (Hardware)