AMD Radeon HD 6990M Rebrand 's Advantages
Released 2 years and 7 months late
More VRAM (1024GB vs 256GB)
Larger VRAM bandwidth (70.40GB/s vs 25.34GB/s)
768 additional rendering cores
NVIDIA GeForce GT 120M Mac Edition 's Advantages
Lower TDP (14W vs 100W)