NVIDIA GeForce GTX 770M 's Advantages
Lower TDP (75W vs 122W)
NVIDIA GeForce GTX 880M 's Advantages
Released 10 months late
Boost Clock has increased by 25% (993MHz vs 797MHz)
More VRAM (8GB vs 3GB)
Larger VRAM bandwidth (160.0GB/s vs 96.19GB/s)
576 additional rendering cores