NVIDIA Quadro K620M 's Advantages
Released 6 years and 8 months late
Boost Clock1124MHz
More VRAM (2GB vs 1GB)
256 additional rendering cores
Lower TDP (30W vs 640W)
NVIDIA Quadro Plex 2100 S4 's Advantages
Larger VRAM bandwidth (76.80GB/s vs 14.40GB/s)