The SSD Review The Worlds Dedicated SSD Education and Review Resource | 
In an attempt to tame the cards temperature from the 480’s design, Nvidia have lost the heatpipe design that was in hindsight not fully up to the job and replaced this with a new vapour chamber designed heatsink.
This along with a redesigned fan that is now around 5dB quieter, and that has also a quieter pitch than the squeaky fan of the 480. The new fan also pushes far more air in and through the heatsink in comparison to the old.
.
We also see thanks to the improved cooling – higher stock clock speeds, 32 more shader cores & one more PolyMorph engine, bilinear filtering speed has been doubled and finally improved power management means that even though the card runs faster, the card has 6W TDP less than the 480.
Its improvements all round!
Full Story @ Eteknix.