AMD Radeon RX 8800 XT 's Advantages
Boost Clock has increased by 92% (2430MHz vs 1266MHz)
More VRAM (16GB vs 8GB)
Larger VRAM bandwidth (624.1GB/s vs 256.0GB/s)
1792 additional rendering cores
AMD Radeon RX 580 OEM 's Advantages
Lower TDP (150W vs 220W)