NVIDIA Quadro K5200 's Advantages
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (192.3GB/s vs 40.10GB/s)
2048 additional rendering cores
NVIDIA Quadro P500 Mobile 's Advantages
Released 3 years and 6 months late
Boost Clock has increased by 97% (1518MHz vs 771MHz)
Lower TDP (18W vs 150W)