The revised Prolimatech Megahalems Rev B. Intel CPU Heatsink now comes LGA 1156 ready and contains 2 sets of wire fan clips for optimal performance out of the box. Due to the originals very high praise from multiple review sites as well as winning the Editor's Choice Gold Award from [H]ard|OCP Enthusiast this cooler is sure to please. When it comes to air cooling this cooler cannot be beat! This heatsink has been carefully engineered for low to medium speed 120 mm fans producing around 57 CFM - fans in this range are quiet at under 26 dBA - but this heatsink still cools better than the competition! Six heatpipes pull heat up to the fins and away from the CPU. The heatsink ships ready to mount to either Socket LGA 775 or the latest Socket LGA 1366 and LGA 1156! **Sockets AM2, AM2+ and AM3 require optional retention hardware The tower type coolers have been the mainstream in the CPU cooling market for quite some time now, but upon closer inspection you start to notice that designs and engineering can only go so far as they slowly come to a bottleneck. After a while they all start to look the same with performance not worth popping the champaign. This is where Prolimatech comes in. We are here to challenge all possible odds and stray away from the norm. With that focus in mind comes the new Megahalems, tower CPU cooler. Never before seen are the new lows in temperature produced by an intelligent design of low air flow resistance with unmatched performance to boost; perfect for the true overclockers in all of us **PLEASE MEASURE YOUR CASE TO INSURE THIS HEATSINK WILL FIT BEFORE PURCHASING!! WILL NOT ACCEPT RETURNS UNLESS ITEM IS DEFECTIVE!**