Zalman CNPS10X Flex Heatsink / Cooler Review
 

The Zalman CNPS10X Flex follows a slightly different path than other CNPS10X models. When compared to other CNPS10X models, the fans are not included and the heatsink is now able to take full advantage of two fans.

http://www.tweaknews.net/reviews/zalman_cnps10x_flex/