AMD Radeon HD 6770M Mac Edition 's Advantages
Lower TDP (35W vs 122W)
NVIDIA GeForce GTX 780M 's Advantages
Released 2 years and 4 months late
Boost Clock797MHz
More VRAM (4GB vs 512GB)
Larger VRAM bandwidth (160.0GB/s vs 57.60GB/s)
1056 additional rendering cores