NVIDIA GeForce GTX 780 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.4GB/s vs 105.8GB/s)
1536 additional rendering cores
NVIDIA GeForce GTX 950 Low Power 's Advantages
Released 2 years and 10 months late
Boost Clock has increased by 32% (1190MHz vs 902MHz)
Lower TDP (75W vs 250W)