AMD Radeon R9 290X2 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (345.6GB/s vs 96.00GB/s)
2304 additional rendering cores
AMD Radeon RX 550 512SP 's Advantages
Released 3 years and 4 months late
Boost Clock1071MHz
Lower TDP (50W vs 580W)