Be bold in your pursuit of cold the masterair pro 4 is the new design in air cooling from cooler master the new cdc 20 technology increases the surface area of the cooler base by 45 the masterair pro 4 also comes with the highest quality fans masterfan pro 120 air balance making it the quietest choices when it comes to air cooling and speaking of quiet we also incorporated anti vibration pads into the fan bracket completely eliminating the metal on plastic vibration noise if you are loo