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Zalman CNPS9300 AT CPU Cooler Review

Manufacturer: Zalman

Features and Specifications

The new CNSP9300 AT from Zalman is a scaled down version of their popular CNPS9700 CPU cooler.  The CNPS9300 AT incorporates a built in 92mm fan and uses the same curved figure 8 heat pipe design with thin copper fins as its big brother.  Thanks to its smaller size the CNPS9300 AT takes up less space, which offers greater compatibility and reduces cost without sacrificing too much performance.  

(Courtesy Zalman USA)


Zalman CNPS9300 AT CPU Cooler Main Features:

•    Innovative curved heat pipe design allows two heat pipes to function as four

•    Pure copper components for optimal heat transfer

•    Component layout designed for maximum cooling

•    Thin copper fins for minimized weight and reduced airflow resistance

•    Supports single, dual and quad core CPUs (Intel 775 and AM2+/AM2/754/939/940

•    Quiet 92mm fan with PWM fan speed control

•    Does not generate noise or vibration in silent mode

Technical Specifications

•    Model number: CNPS9300 AT

•    Dimensions: 61.35 x 108 x 132.5mm (LxWxH)

•    Weight: 407g

•    Materials: Pure copper and Aluminum

•    Fan: Integrated 92mm (Superflo bearings and PWM speed control)

•    Intel support: All Socket LGA775

•    AMD support: Socket AM2+/AM2/754/939/940

Heat Pipe Technology

The Zalman CNPS9300 AT CPU cooler uses two copper heat pipes that are bent into a near figure 8 shape to transport heat away from the CPU into a large array of closely spaced copper fins.  This configuration allows attaching both ends of both heat pipes to the base, which effectively doubles the heat pick up area.

A heat pipe is a highly efficient conductor of heat.  A properly constructed heat pipe has a very low thermal resistance, which is roughly independent of its length (unlike ordinary metal rods whose thermal resistance increases with length).  Heat pipes are commonly used to efficiently transport heat from one location to another.

(Courtesy Zalman USA)

Heat pipes work on the principle of evaporation and condensation.  A working fluid (frequently distilled water) evaporates inside one end of the heat pipe (the hot-end) absorbing heat in the process.  A partial vacuum inside the heat pipe allows the water to evaporate at low temperatures.  Once formed, the water vapor diffuses from an area of high vapor pressure (where it is being generated) to the other end of the tube where the vapor pressure is lower.  The type of working fluid and the degree of vacuum will determine the heat pipe’s temperature range.

The vaporized fluid then condenses back to liquid (at the cold-end) and the heat is dissipated into the air from the metal cooling fins.  The working fluid returns to the hot end via capillary action thru an internal wicking structure (sintered metal coating, fine wire mesh, or grooves) so the heat pipe does not have to rely on gravity to recycle the working fluid.  The key to a heat pipe’s high efficiency is water’s high latent heat of vaporization. 

Packaging and Parts

The CNPS9300 AT CPU cooler comes securely packed inside a colorfully printed display box, along with everything needed to install the cooler on most modern Intel or AMD platforms.

•    CNPS9300 AT CPU cooler

•    Universal mounting hardware for Intel and AMD

•    Tube of Zalman thermal compound

•    Printed Installation instructions sheet

•    Zalman case badge

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