NVIDIA GeForce 840M 's Advantages
Boost Clock has increased by 31% (1124MHz vs 855MHz)
Larger VRAM bandwidth (16.02GB/s vs 16.00GB/s)
64 additional rendering cores
AMD Radeon R5 M430 's Advantages
Released 1 years and 10 months late
More VRAM (4GB vs 2GB)