ATI Radeon HD 5670 's Advantages
Lower TDP (64W vs 195W)
NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Released 3 years and 3 months late
Boost Clock1058MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (192.3GB/s vs 64.00GB/s)
1136 additional rendering cores