AMD Radeon RX 590 's Advantages
Released 5 years and 1 months late
Boost Clock has increased by 98% (1545MHz 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 's Advantages
Lower TDP (30W vs 175W)