NVIDIA GeForce GTX 680 's Advantages
Released 10 months late
Boost Clock1058MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (192.3GB/s vs 91.87GB/s)
1248 additional rendering cores
NVIDIA GeForce GTX 555 OEM 's Advantages
Lower TDP (150W vs 195W)