AMD Radeon R9 M290X Mac Edition 's Advantages
Released 3 years and 7 months late
Boost Clock975MHz
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (174.7GB/s vs 28.80GB/s)
544 additional rendering cores
AMD Radeon HD 6650A 's Advantages
Lower TDP (45W vs 80W)