ATI Mobility Radeon HD 3870 's Advantages
Larger VRAM bandwidth (54.40GB/s vs 28.80GB/s)
NVIDIA GeForce GT 650M 's Advantages
Released 3 years and 9 months late
Boost Clock950MHz
More VRAM (1024GB vs 512GB)
64 additional rendering cores
Lower TDP (45W vs 55W)