NVIDIA Tesla K80 's Advantages
More VRAM (12GB vs 2GB)
Larger VRAM bandwidth (240.6GB/s vs 40.10GB/s)
2240 additional rendering cores
NVIDIA Quadro P500 Mobile 's Advantages
Released 3 years and 2 months late
Boost Clock has increased by 84% (1518MHz vs 824MHz)
Lower TDP (18W vs 300W)