AMD Radeon R9 M290X Mac Edition 's Advantages
Larger VRAM bandwidth (174.7GB/s vs 160.0GB/s)
AMD Radeon E9390 PCIe 's Advantages
Released 4 years and 11 months late
Boost Clock has increased by 12% (1089MHz vs 975MHz)
More VRAM (8GB vs 2GB)
768 additional rendering cores
Lower TDP (75W vs 80W)