My computer has all of a sudden making a squeaking noise coming from the tower, i had only recently bought the computer from a internet cafe, the only problem was it was really dusty and the graphics card would overheat 3 mins into a game, so i bought a new Gigabyte Gtx 750 ti, and my ocmputer has a 500w power supply, more than needed, and the card works fine, its just ever since i cleaned it and installed the new card its been making a squeaking noise.