NVIDIA GeForce GT 640 Rev. 2 's Advantages
Lower TDP (49W vs 150W)
AMD Radeon RX 580 2048SP 's Advantages
Released 5 years and 5 months late
Boost Clock1284MHz
More VRAM (4GB vs 1GB)
Larger VRAM bandwidth (224.0GB/s vs 40.06GB/s)
1664 additional rendering cores