AMD Radeon 550X 's Advantages
Larger VRAM bandwidth (112.0GB/s vs 80.00GB/s)
128 additional rendering cores
NVIDIA T400 4 GB 's Advantages
Released 2 years and 2 months late
Boost Clock has increased by 17% (1425MHz vs 1218MHz)
More VRAM (4GB vs 2GB)
Lower TDP (30W vs 50W)