ATI Radeon HD 3870 Mac Edition 's Advantages
Lower TDP (106W vs 150W)
NVIDIA GeForce GTX 660 Ti 's Advantages
Released 4 years and 2 months late
Boost Clock980MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (144.2GB/s vs 72.06GB/s)
1024 additional rendering cores