NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Boost Clock1058MHz
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (192.3GB/s vs 80.19GB/s)
1152 additional rendering cores
NVIDIA GeForce GT 740 's Advantages
Released 1 years and 1 months late
Lower TDP (64W vs 195W)