NVIDIA Tesla K80 's Advantages
More VRAM (12GB vs 8GB)
Larger VRAM bandwidth (240.6GB/s vs 224.4GB/s)
448 additional rendering cores
NVIDIA Quadro M5500 Mobile 's Advantages
Released 1 years and 5 months late
Boost Clock has increased by 41% (1165MHz vs 824MHz)
Lower TDP (150W vs 300W)