ATI Radeon HD 2600 XT Mac Edition 's Advantages
Lower TDP (45W vs 250W)
AMD Radeon Pro Duo Polaris 's Advantages
Released 9 years and 2 months late
More VRAM (16GB vs 256GB)
Larger VRAM bandwidth (224.0GB/s vs 25.60GB/s)
2184 additional rendering cores