NVIDIA Quadro M5500 Mobile 's Advantages
Boost Clock has increased by 19% (1165MHz vs 977MHz)
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (224.4GB/s vs 80.19GB/s)
1536 additional rendering cores
NVIDIA Quadro M620 Mobile 's Advantages
Released 9 months late
Lower TDP (30W vs 150W)