NVIDIA GeForce GTX 670MX 's Advantages
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (67.20GB/s vs 14.40GB/s)
576 additional rendering cores
NVIDIA GeForce 825M 's Advantages
Released 1 years and 3 months late
Boost Clock941MHz
Lower TDP (33W vs 75W)