NVIDIA Quadro T1000 Mobile 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (128.1GB/s vs 48.06GB/s)
512 additional rendering cores
NVIDIA Quadro P520 Mobile 's Advantages
Boost Clock has increased by 3% (1493MHz vs 1455MHz)
Lower TDP (18W vs 50W)