AMD Radeon R9 M290X 's Advantages
Larger VRAM bandwidth (153.6GB/s vs 96.00GB/s)
768 additional rendering cores
AMD Radeon E9175 PCIe 's Advantages
Released 3 years and 9 months late
Boost Clock has increased by 35% (1219MHz vs 900MHz)
Lower TDP (50W vs 100W)