NVIDIA GeForce 840M 's Advantages
Boost Clock has increased by 12% (1124MHz vs 1000MHz)
AMD Radeon R9 M470 's Advantages
Released 2 years and 2 months late
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (88.00GB/s vs 16.02GB/s)
384 additional rendering cores