As you can guess from their name, Silenx has built their reputation around quiet PC accessories. Their IXC-120HA2 CPU cooler easily lives up to this reputation by being, well, very quiet. Even with its modest fan speeds, this cooler did an excellent job of cooling the Q6600 during testing. That is, until I added some voltage and clock cycles. When your packaging boldly states, “designed for gamers and overclockers,” you'd better bring more performance to the table that the IXC-120HA2 does..

http://www.tweaknews.net/reviews/silenx_ixtrema_cooler/