NVIDIA GeForce 840M 's Advantages
Boost Clock has increased by 9% (1124MHz vs 1030MHz)
Larger VRAM bandwidth (16.02GB/s vs 14.40GB/s)
64 additional rendering cores
AMD Radeon R5 M330 's Advantages
Released 1 years and 2 months late
Lower TDP (18W vs 33W)