NVIDIA GeForce GTX 880M 's Advantages
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 14.40GB/s)
1280 additional rendering cores
NVIDIA GeForce 830M 's Advantages
Boost Clock has increased by 16% (1150MHz vs 993MHz)
Lower TDP (33W vs 122W)