NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Released 3 years and 2 months late
Boost Clock1058MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (192.3GB/s vs 6.400GB/s)
1456 additional rendering cores
ATI Radeon HD 5450 's Advantages
Lower TDP (19W vs 195W)