NVIDIA GeForce 840A 's Advantages
Released 5 years and 5 months late
Boost Clock1124MHz
More VRAM (2GB vs 512GB)
352 additional rendering cores
NVIDIA GeForce 9600M GT Mac Edition 's Advantages
Larger VRAM bandwidth (25.34GB/s vs 16.02GB/s)
Lower TDP (23W vs 33W)