Here is a summary of the EVGA GeForce GTX 660 FTW Signature 2 specs:
The original cooler from EVGA has no proper name, yet it’s quite exciting in terms of design and performance.
The GPU is cooled by a large aluminum heatsink with a copper base and three copper heat pipes, 6 mm in diameter. The heatsink carries two 80mm 9-blade fans. An aluminum contact spot with thermal pad is used to cool the card’s power system components. That spot is actually formed by the bent ends of the main heatsink’s fins which are cooled by one of the fans, so it is a simple and seemingly efficient solution.
The heatsink is covered by a plastic casing which has cutouts in its rear and top.
So, some of the hot air goes out into the chassis and has to be removed by system fans. The card’s fans are the PLA08015S12HH model by Power Logic.
Their speed is PWM-regulated in a range of 1000 to 3100 RPM.
To test the thermals of the reviewed graphics cards we are going to use five consecutive runs of a pretty resource-consuming Aliens vs. Predator (2010) game with the highest image quality settings in 1920x1080 resolution with 16x anisotropic filtering and MSAA 4x antialiasing. We used MSI Afterburner 2.3.0 and GPU-Z 0.6.6 as monitoring tools. This test was performed inside a closed system case at 23°C room temperature. All thermal tests were carried out before we took the card apart, i.e. with its default thermal interface still intact.
Let’s see how EVGA’s original cooler copes with its job with its fans regulated automatically or set at their maximum speed.
Auto fan mode
Maximum fan speed
Running a little ahead, we can tell you that the EVGA is somewhat hotter than the cards from Gigabyte and MSI. In the automatic speed regulation mode, when the fans worked at up to 1830 RPM, the GPU was as hot as 72°C. At the maximum speed of 3090 RPM the temperature was 61°C. That’s good but far from impressive. Besides, we don’t take the noise factor into account as we’ll discuss it later on.
In our overclocking experiments we managed to raise the GPU clock rate of our EVGA GeForce GTX 660 FTW Signature 2 by only 55 MHz and its memory clock rate, by 660 MHz.
The resulting clock rates were 1127/1192/6668 MHz:
That’s an average result for this review as well as for GeForce GTX 660s in general.
It should be noted that the overclocked card was the same temperature as before (72°C at 1830 RPM).