NVIDIA GeForce GTX 660 Ti 's Advantages
Boost Clock980MHz
Larger VRAM bandwidth (144.2GB/s vs 28.80GB/s)
960 additional rendering cores
NVIDIA GeForce GTX 745 OEM 's Advantages
Released 1 years and 6 months late
More VRAM (4GB vs 2GB)
Lower TDP (55W vs 150W)