NVIDIA GeForce GTX 680M 's Advantages
Lower TDP (100W vs 122W)
NVIDIA GeForce GTX 880M 's Advantages
Released 1 years and 9 months late
Boost Clock has increased by 31% (993MHz vs 758MHz)
More VRAM (8GB vs 4GB)
Larger VRAM bandwidth (160.0GB/s vs 115.2GB/s)
192 additional rendering cores