NVIDIA GeForce GT 745A 's Advantages
Boost Clock has increased by 15% (915MHz vs 797MHz)
Lower TDP (33W vs 122W)
NVIDIA GeForce GTX 780M 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 28.80GB/s)
1152 additional rendering cores