Nvida decided to use practically the same cooler used previously on the GTX Titan and GTX 780, what is a good thing. We already had a chance to get acquainted with Nvidia's reference GTX Titan/780 cooler and we found it being adequate for cooling the massive GK110 chip. The cooler was designed to provide superior cooling performance, but generate less noise than previous Nvidia reference coolers. We can confirm that this is also true of the GTX 780 Ti graphics card, the reference cooler is very good indeed.
The GK110-425-B1 chip used on the GTX 780 Ti is in its core the same as chip used for the GTX 780 but it comes with more shaders and a slightly higher GPU clock; 2880 cores and 875MHz Base clocks compared to the GK110 chip on the GTX 780 which features 2304 cores and 863MHz Base clock.
It is perfectly understandable that the GTX 780 Ti heats up a bit more than the GTX 780, but the good news is that the noise level is roughly the same. The GTX 780 Ti cooler is still very quiet and noise is simply not an issue.
The fan management is excellent and the 75mm fan won’t surprise you with sudden RPM changes. You can see how that the fan gradually accelerates when we start a game and slowly decelerates when we’re done gaming.
We were wondering what Nvidia did to keep the new card quiet. The cooler is identical to the reference GTX 780 cooler and it was clear that something else was changed. We noticed that the GTX 780 Ti tended to hit 85 degrees Celsius after a bit of gaming. The GTX 780 maxed out on 80 degrees Celsius. Nvidia just changed the max temperature target, trading heat for silence.