NVIDIA GeForce GTX 680M 's Advantages
Released 2 years and 5 months late
Boost Clock758MHz
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (115.2GB/s vs 12.80GB/s)
1264 additional rendering cores
ATI Mobility Radeon HD 5450 's Advantages
Lower TDP (11W vs 100W)