Ok so I look at the spec sheets on this case and some say it has 3 fans out of the box and some say 4. It says 2 in front and 1 on top and some spec sheets say one on back and some don't. What does it have out of the box? Also would it make a big difference adding 2 more of the optional fans to the side and middle (rear I would already get if not included). I will be overclocking so heat dissipation will be a help even if cooled 1 or 2 degrees more but at the same time I don't want the fans to sound like a 747 is flying through my room.