Construction and design

Construction

Cooler Master provided the Eisberg 240L Prestige with a dual fan heat-exchanger which offers space for two 120 millimeter fans. The manufacturer makes use of a heat-exchanger that is made from cooper entirely. This is one of the main reasons why this all-in-one water cooler isn't as cheap as others since most of the other closed-loop solutions are made from aluminium. But as you might expect you get better cooling performance from an all-copper design. If you look at the heat exchanger from an angle you can see the copper shimmer through, suggesting that Cooler Master was saving money when it comes to the paint job. In fact, putting a very thin layer of paint allows better heat exchange. A closer look at the CPU block reveals that Cooler Master equipped the Eisberg with quite a big unit. The unit serves three purposes: cooler, pump and reservoir. For the cooler part they've chosen a micro fin array made from copper. When it comes to the pump they cooperate with Eheim. What they've done is, they have built a radial pump that operates with up to 3'600 rpm. At these speeds the noise it produces is just unbearable and very disturbing. Cooler Master should seriously consider using another pump. Furhtermore you get two 120 mm fans with this all-in-one watercooler. Those two fans don't support the PWM feature and their standard rotation speed is 1'600 rpm. At these speed their are very well audible and most users wont like the noise level. Nevertheless using voltage regulation adaptors or a fancontroller you can easily lower the rotation speeds to 800 rpm. At this point the fans are silent and you still get plenty of cooling performance.

Design

We did not see any manufacturing mistakes on our sample, and it seems that it has been well made which means that manufacturing quality is on an good level. On the heat-exchanger you see quite a few dents but this is normal with watercoolers. The manufacturer decided to provide the heat-exchanger with oval water tubes. Therefore they have been able to increase cooling surface. A closer look at the CPU coolers case shows that Cooler Master chose solid plastic. When we removed the cooler there were no weird surprises like something coming off. From this angle the Eisberg Prestige is a high-quality product.