Self-Contained Water Coolers: Xigmatek AIO vs. Evercool Silver Knight
 

The idea of the self-contained water cooling is to make water cooling simpler. These two units cannot even be recognized as water cooling systems. They mount just like a heatpipe tower and are a one-piece, no-maintenance, no-risk water cooling system. That concept is certainly intriguing, but the larger question is whether these new self-contained water coolers can give the best air coolers a run for their money. We will find out if they can in our comparison to the top air coolers tested at AnandTech.

http://www.anandtech.com/casecooling...oc.aspx?i=3032

no real surprise here, loud and hot. such compact units can only work if you have large enough radiator and good enough water flow;

here's another example of how this type of HSF does not perform
http://overclockers.com/articles1462/