AMD Radeon R9 280 's Advantages
Released 3 years and 8 months late
Boost Clock933MHz
More VRAM (3GB vs 1GB)
Larger VRAM bandwidth (240.0GB/s vs 76.48GB/s)
992 additional rendering cores
ATI Radeon HD 5770 Mac Edition 's Advantages
Lower TDP (108W vs 200W)