AMD Radeon R9 280 's Advantages
Released 3 years and 1 months late
Boost Clock933MHz
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (240.0GB/s vs 21.34GB/s)
1696 additional rendering cores
NVIDIA GeForce GT 440 Mac Edition 's Advantages
Lower TDP (65W vs 200W)