NVIDIA Tesla M40 24 GB 's Advantages
More VRAM (24GB vs 2GB)
Larger VRAM bandwidth (288.4GB/s vs 48.06GB/s)
2688 additional rendering cores
NVIDIA Quadro P520 Mobile 's Advantages
Released 3 years and 6 months late
Boost Clock has increased by 34% (1493MHz vs 1112MHz)
Lower TDP (18W vs 250W)