Water coolers from the HEATKILLER CPU series are among the most popular and top-selling CPU water coolers. Ever since the launch of the first HEATKILLER CPU water cooler in 2001, the series has been constantly improved and optimized. The HEATKILLER IV presents the most extensive alterations, so far. The focus of innovation was the new cooling structure. Finer micro fins greatly enlarge the contact surface of cooling liquid and cooler. Flow characteristics became optimized as well. These changes increased the cooling performance by up to 3°C compared to the predecessor. The flow efficiency benefits too supported by large-volume receptacles. The HEATKILLER IV features a real high flow design, making it perfectly suitable also for lower performing pumps.