Go to the site of GainWard. I have a Gainward 7900 GS Golden Sample and I use EXPERTTOOL from Gainward. It lets you control your fanspeed very nicely and can do lots of other things to.
Here's the link to ExpertTool http://www.gainward.com/en/support/XPRT_50.zip
But not sure if it works with cards other than the Gainwards, but worth a try to take a look!
Best regards, Kodiak.
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