NVIDIA GeForce GTX 870M 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (120.0GB/s vs 80.00GB/s)
448 additional rendering cores
NVIDIA T500 Mobile 's Advantages
Released 6 years and 9 months late
Boost Clock has increased by 75% (1695MHz vs 967MHz)
Lower TDP (18W vs 100W)