NVIDIA GeForce GTX 780 6 GB 's Advantages
More VRAM (6GB vs 2GB)
Larger VRAM bandwidth (288.4GB/s vs 105.8GB/s)
1536 additional rendering cores
NVIDIA GeForce GTX 950 's Advantages
Released 1 years and 11 months late
Boost Clock has increased by 32% (1188MHz vs 902MHz)
Lower TDP (90W vs 250W)