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Cooling System

Zotac’s Dual Silencer is compact and light.

This cooler consists of a copper base, three 6mm copper heat pipes, an aluminum heatsink, two fans and a figured metallic casing.

Removing one of the fans, we can see that the pipes and heatsink ribs are soldered to each other, which should ensure efficient heat transfer.

No soldering can be seen in the cooler’s base, yet the copper base sits firm on the pipes.

The whole arrangement is cooled by two Apistek fans:

These are 11-blade 80mm fans (part number GA81S2U) whose speed is PWM-regulated from 1000 to 3500 RPM. They seem to run on sleeve bearings. The peak power draw of each fan is 4.6 watts.

We checked out the card’s temperature during five consecutive runs of  Aliens vs. Predator (2010) game with the highest image quality settings in 2560x1440 resolution with 16x anisotropic filtering and MSAA 4x antialiasing):

We used MSI Afterburner 2.2.2 and GPU-Z 0.6.3 as monitoring tools. This test was performed inside a closed system case at 25°C room temperature. All thermal tests were carried out before we took the card apart, i.e. with its default thermal interface still intact.

Now let’s see how efficient the Dual Silencer is on the new GeForce GTX 660 Ti card:


Automatic fan mode

Max fan speed

With the fans regulated automatically, the GPU was 72°C hot and the fans rotated at 2520 RPM. It's hard to evaluate the Zotac cooler without knowing anything about the one installed on the reference GeForce GTX 660 Ti, yet the temperature is quite normal for a fast GPU. Interestingly, the GPU had the same temperature of 72°C at the maximum speed of the fans (3450 RPM), too. Our replacing the default thermal grease with Arctic MX-4 didn't change anything in terms of GPU temperature, either.

 
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