NVIDIA Quadro K3100M 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (102.4GB/s vs 40.10GB/s)
512 additional rendering cores
NVIDIA Quadro P500 Mobile 's Advantages
Released 4 years and 6 months late
Boost Clock1518MHz
Lower TDP (18W vs 75W)