Koolance's new CPU-400I water block promises excellent thermal performance and boasts a new design using POM acetal, a brushed metal cover, and nickel-plated copper to go along with a new cooling engine. Today, we see how well it does in a crowded and competitive market.

My journey into custom watercooling began with one of their CPU water blocks, the CPU-380I to be specific, and it remains a part of my collection even to this day. As with other companies, Koolance has since revised and released newer versions, including the CPU-390I I had examined on release, and it seemed fitting to be able to do so again with their latest and greatest. Koolance is unlike most other brands in that they deal a lot with industrial customers, with the consumer market getting products few and far between. This does not mean they do nothing in the interim, however, with their products coming out when they deem it appropriate and competing right at the top of the performance charts.