NVIDIA GeForce GTX TITAN BLACK 's Advantages
More VRAM (6GB vs 2GB)
Larger VRAM bandwidth (336.0GB/s vs 96.00GB/s)
2368 additional rendering cores
AMD Radeon RX 550 512SP 's Advantages
Released 3 years and 8 months late
Boost Clock has increased by 9% (1071MHz vs 980MHz)
Lower TDP (50W vs 250W)