The Kraken X40 is a sealed liquid cooling system for CPUs, with a 140 mm radiator cooled by a 140 mm fan. Check it out!
The highlights of the Kraken X40 are the 140 mm radiator and fan (most similar products use a 120 mm radiator and fan), and a USB interface that allows you to control and monitor the temperature and the pump and fan speeds through the computer.
Figure 1 shows the box of the NZXT Kraken X40.
Figure 2 shows the contents of the box: the radiator-block set, fans, manuals, driver and utility disk, and installation hardware.
This watercooler is discussed in detail in the following pages.