Yes, all of the ones that were produced using Rivatuner. I personally use MSI Afterburner to control my fan speeds and OC my card. you can make custom fans curves to slow down or speed up the fan to what ever speed you want at what temp you want.
You said the fan did not drop speed so I mentioned the CCC. This if set to manual sets it to one speed only. This is why I mentioned it to see if you accidentally turned it on.