NVIDIA GeForce 840M 's Advantages
Boost Clock has increased by 23% (1124MHz vs 915MHz)
AMD Radeon R7 M380 's Advantages
Released 1 years and 2 months late
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (32.00GB/s vs 16.02GB/s)
256 additional rendering cores