NVIDIA GeForce GTX 660 Rev. 2 's Advantages
Released 1 years and 4 months late
Boost Clock has increased by 14% (1032MHz vs 902MHz)
Lower TDP (140W vs 250W)
NVIDIA GeForce GTX 780 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.4GB/s vs 144.2GB/s)
1344 additional rendering cores