Articles: Cooling

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Design and Functionality

Zalman engineers decided to try the dual-array design with the fan inserted between the heatsink arrays in their new CNPS14X cooler. Zalman already had products featuring two-array heatsinks, but all of them were radial ones. Here we see two rectangular heatsink arrays, which are pierced vertically with the heatpipes:



At the same time, unlike the majority of other coolers with dual-array heatsink design, Zalman CNPS14X doesn’t look bulky. On the contrary it makes an impression of a very light-weight and fine product. Despite this fact, its dimensions are very similar to what other super-coolers have to offer: 140x126x159.3 mm:

The cooler weighs 875 grams.

Each heatsink arrays consists of 45 aluminum fins, each 0.4 mm thick. They are pressed firmly against the heatpipes 1.0 mm away from one another:


There are six heatpipes, each 6 mm in diameter. They go through the copper base plate and pierce the heatsink arrays in a perfect straight line:


Unlike Zalman CNPS12X, the new cooler doesn’t use Zalman’s proprietary composite heatpipes with 50% higher efficiency. This is probably why its price is so affordable. Although it is a real pity that these awesome heatpipes aren’t utilized here.

Here I have to add that the cooler’s effective heatsink surface is 10,466 cm2.

Each heatsink fin has embossed design pressed into them as well as an embossed Zalman logo:

The base plate has special grooves for the heatpipes, which are soldered to the copper plate for added contact efficiency:

The base surface is decently finished, but the reflection of our test figurine is pretty far from mirror perfection:

Zalman rarely has issues with the base evenness and the new Zalman CNPS14X is no exception. The base surface is exceptionally even all the way, and the thermal paste imprints left by our test processor are practically ideal:


There is a 135 mm fan installed between the two heatsink arrays on a two-leg steel stand:


It looks very similar to the ZM-F4 fan, but is marked as ZP13525BLL. The rotation speed is automatically adjusted using PWM method in the interval from 950 to 1350 RPM generating between 17 and 21 dBA of noise. The fan specifications do not mention the static pressure or airflow. The enhanced slide bearing in the fan should last at least 50,000 hours or 5.7 years of non-stop operation. The maximum fan power consumption shouldn’t exceed 3.4 W. Our measurements showed that this fan didn’t need more than 1.9 W of power and could easily start at 3.5 V voltage.

With the included wire clips you can attach two additional fans to the new Zalman CNPS14X cooler:

Zalman specifically recommends this particular configuration for overclocker systems.

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