AMD Radeon E9173 PCIe 's Advantages
Released 2 years and 11 months late
Boost Clock has increased by 25% (1219MHz vs 975MHz)
Lower TDP (35W vs 80W)
AMD Radeon R9 M290X Mac Edition 's Advantages
Larger VRAM bandwidth (174.7GB/s vs 48.00GB/s)
512 additional rendering cores