AMD Radeon RX 550X 640SP 's Advantages
Released 5 years late
Boost Clock has increased by 7% (1071MHz vs 1000MHz)
Lower TDP (60W vs 375W)
AMD Radeon HD 8990 OEM 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.0GB/s vs 96.00GB/s)
1408 additional rendering cores