NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Boost Clock has increased by 1% (1058MHz vs 1050MHz)
Larger VRAM bandwidth (192.3GB/s vs 32.00GB/s)
1152 additional rendering cores
AMD Radeon R7 250 OEM 's Advantages
Released 6 months late
Lower TDP (65W vs 195W)