My 6600 GT was making lots of noises that were driving me crazy. I could not understand why it was necessary to run the fan in full speed when writing a blog post like this. I was able to reduce the fan speed using the software Rivatuner which has fan profiles for 2D, low power 3D and 3D modes.

Reducing the fan speed is not possible for every video card. I had to update the bios of my last video card to be able to reduce the fan speed. My suggestion is to load Rivatuner and see if you can change the fan speeds to reduce the noise of your video card. Here is how you do that:

Begin by downloading and installing Rivatuner. Once that is done run the software, you will see the following screen.

Click on Customize in the Driver settings block. A overlay menu should appear with several icons, click on the first entitled System Settings. This will load another menu with several tabs. The second tab is called Fan and that is where you can reduce the fan speed for the different modes.

I suggest to play around with the settings a little bit. I would leave the performance 3D setting at 100% and reduce the other two settings. In my case I have given them the values 40% and 50% respectively. Make sure that you monitor temperatures of your video card when applying this settings. You have to make sure that it is running stable with this reduced fan speeds.

Click on Apply fan settings at Windows startup. This ensures that fan speed will be reduced during Windows startup to lower the noise when working with Windows.

Rivatuner has an option to monitor the temperature of the video card. Click on ok to leave that menu so that you see the main menu again. Click the Customize link at the Target Adapter setting and select Hardware Monitoring from the list. Now click on the red dot in the left bottom corner. This starts hardware monitoring and will report the temperature of the video card if it has a thermal diode.

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A guy suggested to use the freeware RivaTuner which he said was able to reduce the fan speed of my video card by altering the fan speed directly. This was the solution I was looking for. I quickly downloaded and installed Rivatuner. The only thing left was to lower the fan speed and make the changes permanent.

I clicked on customize in the first screen that appeared right next to Forceware detected and selected the icon for system settings from the panel. The second tab was named fan, the goal of my search. I was able to define a fan speed value for three different states: standard 2D, low power 3D and performance 3D. I changed the settings from 100% to 25 in standard 2D mode, 50% for low power 3D and 100% for performance 3D. 2D means everything that you do normally in windows like using office, surfing the internet or writing an email.

I checked the box that saved the settings and applied them at every system start and voila – the noise was gone. From one second to the next it was gone. My pc is almost silent now, the noisiest part is my external hard drive, everything else is almost silently. (I bought a low noise cpu fan and power supply).

I suggest you take a look at Rivatuner if you face a similar problem like I did. It might solve yours too

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