NVIDIA GeForce 840A 's Advantages
Released 2 years and 10 months late
Boost Clock1124MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (16.02GB/s vs 14.40GB/s)
336 additional rendering cores
NVIDIA GeForce GT 520MX 's Advantages
Lower TDP (20W vs 33W)