A closer examination of the aluminum fins reveals three copper pipes that are located in the center of the unit. The copper pipes work in conjunction with what Asetek refers to as its "evaporation chamber" or "copper chamber" which contains hermetically sealed gas that uses the same cooling principles as phase change cooling. Most consumers familiar with Asetek products have seen this technology primarily used in the larger VapoChill refrigeration units. The main difference here is that the "evaporation chamber" or "copper chamber" sits on top of a CPU and when heat is generated the liquid contained in the chamber will evaporate and travel into the three copper pipes. The copper pipes are then cooled by the aluminum fins and the 90mm fan which releases the liquid now in gas form. The direct result is that this process will condense the evaporated liquid back into a liquid state. The cycle is repeated over and over again by transferring large quantities of heat with very low thermal gradients for effective cooling.