NVIDIA GeForce 825M 's Advantages
Released 5 years and 6 months late
Boost Clock941MHz
More VRAM (1024GB vs 512GB)
288 additional rendering cores
Lower TDP (33W vs 65W)
NVIDIA GeForce 9800M GT 's Advantages
Larger VRAM bandwidth (51.20GB/s vs 14.40GB/s)