The Noctua brand is home to a number of efficient products aimed at noise-minded consumers. The Noctua NC-U6 is another example of one of these products. The passively cooled chipset heatsink is obviously silent in operation and is manufactured to provide effective and efficient cooling without adding noise to the system. The NC-U6 isn’t the largest of passive designs out there but the heritage it comes from is huge so I expect big things from this little cooler.