NVIDIA Quadro P400 's Advantages
Released 8 years and 7 months late
Boost Clock1252MHz
More VRAM (2GB vs 1GB)
128 additional rendering cores
Lower TDP (30W vs 640W)
NVIDIA Quadro Plex 2100 S4 's Advantages
Larger VRAM bandwidth (76.80GB/s vs 32.06GB/s)