NVIDIA GeForce GTX 1080 11Gbps 's Advantages
Boost Clock has increased by 62% (1733MHz vs 1071MHz)
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (352.3GB/s vs 96.00GB/s)
2048 additional rendering cores
AMD Radeon RX 550 512SP 's Advantages
Released 6 months late
Lower TDP (50W vs 180W)