AMD Radeon HD 6390 's Advantages
Lower TDP (39W vs 150W)
AMD Radeon RX 580 2048SP 's Advantages
Released 7 years and 3 months late
Boost Clock1284MHz
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (224.0GB/s vs 16.00GB/s)
1728 additional rendering cores