I heard that the silverstone series are more directed like a cone so it's goes to a certain spot instead of air flow, does that matter a lot?
And can you rephrase what this guy is saying about the placements of the fans?
Pros: Cheaper than competitive fans.
Includes mounting screws.
Silent when ran at full speed.
Amazing distance (can feel the air from 2 feet away).
Directional: the airflow isn't dispersed, but flows more like in a cone. Great to push air in a straight path to cool components in a specific spot.
Cons: These are meant to be mounted in an unconstricted location such as an exhaust at the top or back of your case, or even intake at the side of your case if your case allows it. I tried using it as an intake at the front of my Corsair C70. But once I put the front back on, the filter greatly restricted the airflow.
Unlike the AP121s, the 122s don't have the braiding on the cables. Also, the original 121's housing for the fan feels more solid, but the 122s feel like cheaper plastic.
Other Thoughts: Overall these are good fans. I have 2 and use them on the side of my case as intake to help cool my graphics card. They do push air in a column like flow.
One thing to note; the AP series of fans are NOT meant for high CFM airflow, but DIRECTIONAL airflow, meaning you're not going to fill your case with TONS of fresh air, but deliver air where it counts.
And what does rad, pwm, static pressure mean?