ATI Mobility Radeon HD 5670 Mac Edition 's Advantages
Lower TDP (15W vs 100W)
NVIDIA GeForce GTX 680M 's Advantages
Released 2 years and 2 months late
Boost Clock758MHz
More VRAM (4GB vs 512GB)
Larger VRAM bandwidth (115.2GB/s vs 25.44GB/s)
944 additional rendering cores