NVIDIA GeForce GTX 880M 's Advantages
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 14.40GB/s)
1024 additional rendering cores
NVIDIA GeForce 940M 's Advantages
Released 1 years late
Boost Clock has increased by 11% (1098MHz vs 993MHz)
Lower TDP (75W vs 122W)