AMD Radeon RX 580 's Advantages
Released 3 years and 5 months late
Boost Clock has increased by 72% (1340MHz vs 780MHz)
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (256.0GB/s vs 28.80GB/s)
1984 additional rendering cores
AMD Radeon R7 240 OEM 's Advantages
Lower TDP (50W vs 185W)