AMD Radeon R9 M390X 's Advantages
Lower TDP (75W vs 210W)
AMD Radeon Pro Vega 56 's Advantages
Released 2 years and 3 months late
Boost Clock1250MHz
More VRAM (8GB vs 4GB)
Larger VRAM bandwidth (402.4GB/s vs 160.0GB/s)
1536 additional rendering cores