AMD Radeon RX 455 OEM 's Advantages
Released 3 years and 2 months late
Lower TDP (100W vs 375W)
AMD Radeon HD 8990 OEM 's Advantages
Boost Clock1000MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.0GB/s vs 104.0GB/s)
1280 additional rendering cores