Although the SilenX EFZ-120HA4 heatsink appears nearly identical to the XtremeGear HP-1216B, Spire Thermax Eclipse II, and 3Rsystem Iceage 120 Boss II heatsinks... it's a popular style, clearly... each heatsink is a little different and the fans are all completely different. Common to all heatsinks of this style are five 8mm diameter exposed base copper heatpipes which form a distinctive "X" pattern in the aluminum fins.



Link: Frostytech