AMD Radeon HD 6390 's Advantages
Lower TDP (39W vs 300W)
AMD Radeon RX 7900 XT 's Advantages
Released 11 years and 4 months late
Boost Clock2394MHz
More VRAM (20GB vs 1024GB)
Larger VRAM bandwidth (800.0GB/s vs 16.00GB/s)
5056 additional rendering cores