NVIDIA Quadro M3000 SE 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.4GB/s vs 48.06GB/s)
640 additional rendering cores
NVIDIA Quadro P520 Mobile 's Advantages
Released 2 years and 7 months late
Boost Clock has increased by 62% (1493MHz vs 924MHz)
Lower TDP (18W vs 75W)