Pull the card out and examine it. If the bearings are shot then a visit to a computer store might provide a replacement.
Hey guys and gals, I have an MSI Radeon 6970 and the fan is unbearably loud. I turn down the fan speed to deal with this, but as a result the GPU really heats up when playing games like BF3 and Skyrim. I was wondering if you guys know about any good GPU fans I can replace the default one with. Thanks