Quadro M2000 's Advantages
Boost Clock has increased by 19% (1163MHz vs 977MHz)
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (105.8GB/s vs 80.19GB/s)
256 additional rendering cores
Quadro M620 Mobile 's Advantages
Released 9 months late
Lower TDP (30W vs 75W)