NVIDIA GeForce GTX 660 Ti 's Advantages
Larger VRAM bandwidth (144.2GB/s vs 96.00GB/s)
704 additional rendering cores
AMD Radeon RX 550X 640SP 's Advantages
Released 5 years and 8 months late
Boost Clock has increased by 9% (1071MHz vs 980MHz)
Lower TDP (60W vs 150W)