NVIDIA GeForce 8600M GT 's Advantages
Lower TDP (20W vs 122W)
NVIDIA GeForce GTX 680MX Mac Edition 's Advantages
Released 5 years and 5 months late
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (160.0GB/s vs 22.40GB/s)
1504 additional rendering cores