ATI Radeon HD 3870 Mac Edition 's Advantages
Lower TDP (106W vs 150W)
AMD Radeon R9 370 1024SP 's Advantages
Released 7 years late
Boost Clock975MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (179.2GB/s vs 72.06GB/s)
704 additional rendering cores