NVIDIA Quadro P1000 's Advantages
Boost Clock has increased by 9% (1480MHz vs 1354MHz)
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (80.19GB/s vs 80.13GB/s)
128 additional rendering cores
NVIDIA Quadro P620 's Advantages
Released 1 years late
Lower TDP (40W vs 47W)