AMD Radeon HD 6630M Mac Edition 's Advantages
96 additional rendering cores
Lower TDP (26W vs 33W)
NVIDIA GeForce GT 745A 's Advantages
Released 2 years and 7 months late
Boost Clock915MHz
More VRAM (2GB vs 256GB)
Larger VRAM bandwidth (28.80GB/s vs 19.20GB/s)