NVIDIA GeForce GTX 960M 's Advantages
Released 3 years late
Boost Clock has increased by 24% (1176MHz vs 950MHz)
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (80.19GB/s vs 64.00GB/s)
256 additional rendering cores
NVIDIA GeForce GTX 660M 's Advantages
Lower TDP (50W vs 75W)