Asus is apparently working on a third model that will be a part of the Dragon Edition lineup, the Geforce GTX 660 Dragon Edition. Following the footsteps of previously release GTX 660 Ti Dragon and HD 7850 Dragon, the GTX 660 Dragon Edition will also come with similar sets of features seen on the DirectCU II version but with a different color scheme.
When compared to the DirectCU II version, the Dragon Edition GTX 660 also lacks the aluminum back-plate on the back of the PCB but features slightly higher GPU Boost clocks set at 1150MHz. The 2GB of GDDR5 memory paired up with a 192-bit memory interface ended up clocked at reference 6.0GHz. In case you missed it, the GTX 660 is based on the 28nm GK106 GPU and features 960 CUDA cores.

Unfortunately, the Dragon Edition cards are usually limited to Chinese market and were not seen in Europe or the States.



Source: Techpowerup.com