Do not question the great leader ' s choices . His will is the people ' s will . <| sep |> 1 . It has to support your CPU socket . 2 . It has to fit inside your case . Most case review will tell you , how tall your CPU cooler can be . 3 . Check if the height of your RAM will interfere with it if it should overhang your RAM . 4 . Do you even need an aftermarket cooler ? Unless you want to overclock your CPU or want to have a really quiet PC , you don ' t really need one . The coolers included with CPUs are designed to adequately cool it . Some CPUs don ' t come bundled with a cooler though . 5 . How do you want it to look and what kind of performance do you expect from it ? <| sep |> Why would you post this to the same sub twice ?