Hi, My GeForce 4 Ti card, which I placed in my Mac after I bought it about a couple years ago, has been generating odd noises over the past couple of months. At first I thought it was simply a hard drive that maybe was jostled and was rattling the case, but after opening the computer up, I can clearly see the GeForce 4 Ti card's fan struggling to rotate at its usual speed. Now, the computer doesn't seem to be overheating just yet...no graphical anomalies, I give it a rest if I hear it catching particularly badly, and I'm in a room that isn't too hot. However, I'm worried about the card's long term health. My question should I try to reseat the fan? Is it an issue of dust, or do I need to get a whole new fan-unit? I have some compressed air, but I didn't know if that would do the trick. Please post suggestions other than simply "clean it," since I am fairly sure this is not a dust problem (not that I won't rule it out.) Thanks in advance.