NVIDIA GeForce GTX 880M 's Advantages
More VRAM (8GB vs 4GB)
Larger VRAM bandwidth (160.0GB/s vs 76.80GB/s)
640 additional rendering cores
AMD Radeon R9 M385 's Advantages
Released 1 years and 2 months late
Boost Clock has increased by 1% (1000MHz vs 993MHz)