NVIDIA Quadro P4200 Mobile 's Advantages
Boost Clock has increased by 10% (1647MHz vs 1493MHz)
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (192.3GB/s vs 48.06GB/s)
1920 additional rendering cores
NVIDIA Quadro P520 Mobile 's Advantages
Released 1 years and 3 months late
Lower TDP (18W vs 100W)