NVIDIA GeForce GTX 780 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.4GB/s vs 96.00GB/s)
1664 additional rendering cores
AMD Radeon RX 550X 640SP 's Advantages
Released 4 years and 11 months late
Boost Clock has increased by 19% (1071MHz vs 902MHz)
Lower TDP (60W vs 250W)