NVIDIA GeForce GTX 680M 's Advantages
Boost Clock has increased by 15% (758MHz vs 657MHz)
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (115.2GB/s vs 64.13GB/s)
576 additional rendering cores
NVIDIA GeForce GTX 760A 's Advantages
Released 1 years and 9 months late
Lower TDP (55W vs 100W)