NVIDIA GeForce GT 640 's Advantages
Lower TDP (65W vs 175W)
NVIDIA GeForce RTX 2070 's Advantages
Released 6 years and 4 months late
Boost Clock1620MHz
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (448.0GB/s vs 28.51GB/s)
1920 additional rendering cores