NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Boost Clock1058MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (192.3GB/s vs 72.00GB/s)
896 additional rendering cores
AMD Radeon R7 250X 's Advantages
Released 10 months late
Lower TDP (80W vs 195W)