Recently I was cleaning my computer parts as there was a lot of dust inside the cabinet. I took out everything and just finished cleaning up the RAMs. I was trying to clean the amd phenom ii x4 965 and I was thinking how to take out this stock fan. I could not see any screws there which I can unscrew. There are some plastic holes on the fan but they are sealed and cant see any screws. It all covered with dust. Please help out with the fan.