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The Gigabyte complies with the reference GeForce GTX 660 specs in terms of memory frequency. Unfortunately, the graphics card makers are reluctant to pre-overclock memory chips.

The Gigabyte GeForce GTX 660 Ultra Durable is fitted with the WindForce 2X cooler. We've examined it in our recent GeForce GTX 650 Ti review but seem to have an enhanced version of it here.

There are not two but four heat pipes in the cooler's base now. There's no direct-touch technology as the base is made of nickel-plated copper. The power components are cooled by the main heatsink via a thermal pad (as on the EVGA card).

The components of the cooler (the pipes, the fins and the base) are all soldered to each other.

The cooler has two PWM-regulated 90mm fans. According to our monitoring tools, their speed varies from 900 to 2600 RPM.

The WindForce 2X copes with its job superbly. In the automatic regulation mode its fans worked at 1920 RPM and the GPU was no hotter than 60°C.


Auto fan mode

Maximum fan speed

The GPU was a mere 55°C at the maximum speed of the fans! That’s an excellent result compared to both the reference card and the above-discussed EVGA.

We managed to overclock the GPU and memory of our Gigabyte GeForce GTX 660 Ultra Durable by 90 and 760 MHz, respectively.

That’s the same GPU clock rate as we reached with the EVGA card while the resulting memory clock rate is even a little higher.

Gigabyte’s cooler did well on the overclocked card, keeping the GPU temperature as low as 61°C at 2010 RPM.

 

 
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