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Nvidia's GTX 660 Ti offers same Kepler performance, better price - ExtremeTech
Update) GeForce GTX 660 Is Faster Than Radeon HD 7870, Costs $229 | VideoCardz.com
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NVIDIA GeForce GTX 660 Specs | TechPowerUp GPU Database
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Inno3D GeForce GTX 660 Ti iChill review - DX11: Alien Versus Predator - Lost Planet 2
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GeForce GTX 660 vs 480
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Benchmarks and performance - Asus GTX 660 Ti DCU II Top review | TechRadar
