9800 GTX and Fan Speed Control

[HarryMan]

Hello!

I am currently using Linux Mint 13.
My nvidia driver version is 259.49.

I tried several things to control my fan speed.

1.) I added the
Option "Coolbits" "5"
in the Device section at the /etc/X11/xorg.conf section

2.) i ran:
# dpkg-reconfigure xserver-xorg

3) nvclock is not working. Error:
Speicherzugriffsfehler (Speicherabzug geschrieben)
Meaning: Memory error in English I guess.

Step 1+2 activated the "Thermal settings" @ "NVIDIA X Server Settings".
Adjusting the fan speed there has no effect.

Any more ideas?