Na wat googlen:
http://www.gpugrid.net/forum_thread.php?id=2925Also works for Ubuntu 12.04
After installing the NVidia drivers, or just using the default 280.13 drivers, you can augment them by adding Coolbits. Coolbits is basically an optional NVIDIA X Server component that adds a slide bar to control GPU fan speed.
Edit /etc/X11/xorg.conf, by pressing Alt+F2 and typing gksu gedit /etc/X11/xorg.conf
Add Option "Coolbits" "5" under the Device section, and save the file.
For example,
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 570"
Option "NoLogo" "True"
Option "Coolbits" "5"
EndSection
If there is more than one device, "Device1", "Device2", then you will need to add Option "Coolbits" "5" to each section.
Restart and open NVIDIA X Server.
On the left hand side, under your GPU, 'GPU 0 - (GeForce GTX 570)' for example, you should see a Thermal Settings entry.
Click on it, scroll down, and accept the agreement. Once you do this you can directly control the fan speed by sliding the slide bar. You can also see the GPU temperature from there. I suggest you keep the temps below 70°C if possible.
NB. You must go into the NVidia X Server after every restart and set the Thermal Settings.
You also have to set PowerMizer to 'Prefer Maximum Performance'.
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Dat moet ik vanavond maar eens gaan proberen. Vervelend dat ik telkens, na iedere start, weer de boel moet gaan instellen.