NVIDIA GeForce GTX 870M 's Advantages
Larger VRAM bandwidth (120.0GB/s vs 80.19GB/s)
704 additional rendering cores
NVIDIA GeForce GTX 960M 's Advantages
Released 1 years late
Boost Clock has increased by 22% (1176MHz vs 967MHz)
More VRAM (4GB vs 3GB)
Lower TDP (75W vs 100W)