NVIDIA GeForce GTX 680 's Advantages
Larger VRAM bandwidth (192.3GB/s vs 80.19GB/s)
1024 additional rendering cores
NVIDIA GeForce GTX 750 GM206 's Advantages
Released 3 years and 8 months late
Boost Clock has increased by 17% (1239MHz vs 1058MHz)
Lower TDP (60W vs 195W)