NVIDIA GeForce 840A 's Advantages
Released 4 years and 9 months late
Boost Clock1124MHz
More VRAM (2GB vs 1024GB)
288 additional rendering cores
Lower TDP (33W vs 38W)
NVIDIA GeForce GTS 260M 's Advantages
Larger VRAM bandwidth (57.60GB/s vs 16.02GB/s)