I have an Akasa Vortexx Neo fan for my graphics card that I had since a month ago and things have been fine with it only to encounter a problem with it weeks later. I noticed something strange with the fan where it will make a low electrical buzz as it spins but it only lingers between 10-15 minutes and happens randomly when I have the computer on. It happens on and off basically. I was wondering if it was a dust-related or to do with running programs that are computer-intensive and I honestly don't have a clue. Can anyone help me out here?