Sealed, all-in-one water coolers seem to be the fastest-growing segment of the CPU cooler market today. Air coolers are reaching their physical limits: given the room inside existing cases, and the (frequently ignored) weight limits defined for CPU coolers, something like a Prolimatech Megahalems is about as big as you can get without running into problems. Water cooling systems work around these problems by moving the heat exchanger off of the CPU socket, and using a fluid to transfer heat from the CPU to the heat exchanger. Coolit Systems has been making retail and bespoke liquid cooling systems for some years now, and the Coolit Vantage A.L.C. cooler brings new features and performance to the fray. Benchmark Reviews pits this new entry against existing air and water coolers in a performance showdown.