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Although the Inno3D has the same memory chips as the reference card from Nvidia or the card from EVGA, it is pre-overclocked by 2.7% to 7200 MHz.

The default clock rates of 1150/1202/7200 MHz make the Inno3D iChill GeForce GTX 770 HerculeZ X3 Ultra the fastest card in this review.

Being identical to the Inno3D iChill GeForce GTX 780 Ultra externally, the iChill GeForce GTX 770 Ultra is, of course, equipped with the same cooler called HerculeZ X3.

 

We covered it in our previous review, so we’ll just try to find something interesting about it we may have missed earlier.

The heatsink consists of two sections and five nickel-plated copper heat pipes, 6 mm in diameter.

The photo of the back side of the logo panel shows three fan connectors and a jumper that can be used to control the speed of the fans.

We also took the impeller off the motor:

That was easy. So we could clean it and also examine the fan’s motor.

There are slits in the fan frames to let the air in, which is important when there’s another SLI-connected graphics card nearby.

The HerculeZ X3 copes perfectly with its job. In the automatic regulation mode the fans accelerated to 1260 RPM and the GPU was only 57°C hot.


Automatic fan mode

Maximum fan speed

And if you set the fans at their maximum speed (which is not really necessary), the GPU will be as cold as 48°C. Inno3D's cooler seems to be head above its opponents in performance, but we are yet to carry out comparative tests.

Notwithstanding the efficient cooler and lower temperatures, the Inno3D card couldn't be overclocked better than the EVGA. We only managed to increase its GPU and memory frequencies by 70 and 780 MHz, respectively.

The resulting clock rates were 1220/1272/7980 MHz.

The overclocked Inno3D was 2°C hotter than at its default settings. The speed of the fans didn’t change.

Increasing the GPU voltage didn’t help us reach higher clock rates.

 
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