AMD Radeon R9 M290X Mac Edition 's Advantages
More VRAM (2GB vs 1GB)
Larger VRAM bandwidth (174.7GB/s vs 16.02GB/s)
640 additional rendering cores
NVIDIA GeForce 945M 's Advantages
Released 1 years and 5 months late
Boost Clock has increased by 22% (1189MHz vs 975MHz)
Lower TDP (23W vs 80W)