NVIDIA GeForce GTX 680 Mac Edition 's Advantages
Released 6 years and 3 months late
Boost Clock1058MHz
More VRAM (2GB vs 256GB)
Larger VRAM bandwidth (192.3GB/s vs 12.80GB/s)
1536 additional rendering cores
ATI Radeon X1550 's Advantages
Lower TDP (27W vs 195W)