Very good cooler installed on a P4 3.4GHz with Intel 775 Motherboard D915GAV. The aim of the maneuver was to gain silence this old tower Antec. The cooler comes with adaptations to different sockets ... on my config, no pb, it works well and what silence. Coolant level, I do not comment because I do not have firsthand out bios but the CM non accelerate the order speed of the fan, I guess cooling is correct for Internet use, office automation, video playback and photo on basic software .. Perfect transaction on Amazon (as usual)