Traditionally, a specialists in aluminum/copper fin 'ring' type CPU coolers, Zalman maintained a performance leadership till aluminum fin tower type CPU coolers took over as the better performing design. Zalman was forced to keep up with the trend, which it did with the introduction of its CNPS-10X series coolers, namely CNPS-10X Quiet, and CNPS-10X Extreme. The third one in the series, which Zalman recently made available to European stores, is the CNPS-10X Flex. This is basically a tower-type heatsink that uses a block of 56 aluminum fins (some of which are anodized black), to which heat is conveyed by five copper heat-pipes. While it does not include a fan of its own, it gives you the flexibility of using your own 120 mm fan, and allows for two fans in all. The retention module supplied supports all current CPU sockets, including LGA-1366, LGA-1156, LGA-775, and AM3/AM2+/AM2. Priced at €40, it is €10 cheaper than the CNPS-10X Quiet, enough price difference to allow you to buy a decent-quality 120 mm fan of your choice, be it performance-oriented, or quiet.