NVIDIA Tesla M40 's Advantages
More VRAM (12GB vs 2GB)
Larger VRAM bandwidth (288.4GB/s vs 64.13GB/s)
2688 additional rendering cores
NVIDIA Quadro P600 's Advantages
Released 1 years and 3 months late
Boost Clock has increased by 40% (1557MHz vs 1112MHz)
Lower TDP (40W vs 250W)