The CoolIT PURE CPU cooler utilizes a pre-plumbed, factory sealed, closed loop radiator and pump module designed to effectively and efficiently dissipate heat from the CPU. Up until now CoolIT's CPU coolers have harnessed the power of both liquid cooling and thermoelectrics, but that is not the case with Pure. What some thought could not be done CoolIT Systems has done, released a CPU only water cooler that costs under $100.
"With the PURE being a sealed system it is ok for the fact that it is maintenance free. The downside is that it is not expandable. Another downside is that air that is trapped in the system is there forever. The unit I tested had some air trapped in it. It took a good 3 days of it sitting upright to stop gurgling. After that it was good to go, just as long as I didn't bump the case or disturb the cooler in any way..."