AMD Radeon R9 M290X 's Advantages
Released 6 years and 3 months late
Boost Clock900MHz
More VRAM (4GB vs 512GB)
Larger VRAM bandwidth (153.6GB/s vs 20.32GB/s)
1248 additional rendering cores
NVIDIA GeForce 8600M GT Mac Edition 's Advantages
Lower TDP (20W vs 100W)