AMD Radeon RX 580 's Advantages
Released 2 years and 8 months late
Boost Clock has increased by 45% (1340MHz vs 925MHz)
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (256.0GB/s vs 179.2GB/s)
1024 additional rendering cores
AMD Radeon R7 265X OEM 's Advantages
Lower TDP (150W vs 185W)