NVIDIA GeForce GTX 1080 Ti 12 GB 's Advantages
Boost Clock has increased by 56% (1670MHz vs 1071MHz)
More VRAM (12GB vs 2GB)
Larger VRAM bandwidth (528.4GB/s vs 96.00GB/s)
2560 additional rendering cores
AMD Radeon RX 550 640SP 's Advantages
Lower TDP (60W vs 250W)