NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Boost Clock1058MHz
Lower TDP (195W vs 500W)
AMD Radeon R9 295X2 's Advantages
Released 1 years late
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (320.0GB/s vs 192.3GB/s)
1280 additional rendering cores