NVIDIA GeForce GTX 780M 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 48.06GB/s)
1152 additional rendering cores
NVIDIA GeForce MX250 's Advantages
Boost Clock has increased by 30% (1038MHz vs 797MHz)
Lower TDP (10W vs 122W)