If you have CORSAIR Coolers: H50, H55, H75, H80i v2 (H80i GT), H90, H100i v2 (H100i GTX), H105, H110i GTX, H115i, you will need to order this bracket to install the cooler on an AM4 socket.
If you have CORSAIR Coolers: H60, H110i (H110i GT), H100i, the cooler is compatible with the existing AMD bracket out of the box. The AMD bracket for these coolers can be ordered here.