NVIDIA GeForce GTX 780 6 GB 's Advantages
More VRAM (6GB vs 2GB)
Larger VRAM bandwidth (288.4GB/s vs 86.40GB/s)
1664 additional rendering cores
NVIDIA GeForce GTX 750 Ti 's Advantages
Boost Clock has increased by 20% (1085MHz vs 902MHz)
Lower TDP (60W vs 250W)