My computer's video card fan is louder sometimes, how do I fix it?

I've tried cleaning it out several times with air can and it didn't help. I used the air can to dust the whole inside of the computer and still doesn't help the noise. It doesn't make the noise all the time, just sometimes. Sometimes it gets louder when I'm sleeping at night so the computer's not even doing anything at that point. Do I need to get a new video card? Should I get a fan card that would go in another slot like this? http://www.newegg.com/Product/Product.as…



What are my options?



Here's a link to what the fan looks like.



tinypic.com/r/i5n71g/7|||Video card fans operate at different speeds depending on the temperature of the card. If your card is more than 2 years old then I'd suggest upgrading anywayjust cuz it's about that time.



You can download free temp monitoring software (like GPU-Z) to monitor and log the temperatures to find out when it's spiking and why. It might just be that the sensor is faulty and that would mean replacement.|||You could try replacing the fan, but you may need a new video card. Check the temps of the card and see if it overheats or anything. Also run stress tests to see if it's the video card or the fan. Im not sure if that type of fan you're looking at on newegg will fit