AMD Radeon R9 270 's Advantages
Released 3 years and 4 months late
Boost Clock925MHz
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (179.2GB/s vs 76.48GB/s)
480 additional rendering cores
ATI Radeon HD 5770 Mac Edition 's Advantages
Lower TDP (108W vs 150W)