NVIDIA Quadro M3000 SE 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (160.4GB/s vs 80.13GB/s)
512 additional rendering cores
NVIDIA Quadro P620 's Advantages
Released 1 years and 4 months late
Boost Clock has increased by 47% (1354MHz vs 924MHz)
Lower TDP (40W vs 75W)