If you're not a geek, or overclocker/gamer, click back now... I just got my new cooler, the CoolerMaster X-Dream, and I started testing it, playing with fan speeds and so forth, and investigated the "aerodynamically designed fan grille" as they call it, and thought I heard a "swooshing" that shouldn't be there...I removed the aforementioned grille and replaced it with a standard chrome grille, and lo and behold, the noise was gone! And they've built half of the marketing campaign on the grille, wich just made things worse! I emailed them about it, and I'm dying to see what they'll say (and it's not just my HSF that did this, I called a friend and told him to do the same, and it worked there too...) . Oh yeah, it is by the way a very good cooler, 35C idle, 39 full load (Athlon 1133)!