NVIDIA GeForce GTX 660 Ti 's Advantages
Lower TDP (150W vs 195W)
NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Released 8 months late
Boost Clock has increased by 8% (1058MHz vs 980MHz)
Larger VRAM bandwidth (192.3GB/s vs 144.2GB/s)
192 additional rendering cores