Yea, so I need a little help here. Recently (about 2 1/2 weeks now) my computer has been making a rather weird growling sound. I traced the sound to the fan on my video card. It was a little dirty so I cleaned it will an aircompressor and cotton swabs and made sure it was spotless, then put it back in. The thing is, the fan is still growling, it sometimes sounds normal but won't stay that way for more than 30 sec. or so.
So my Question is, why is my video card making these loud noices, and how can I fix it, without buying a whole new video card of course.
P.S. I'm running an Nvidia 8600 GT.