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Gigabyte GeForce GTX 660 specifications
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NVIDIA Launches the GeForce GTX 660 Ti - The Game Fanatics
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MSI GTX 660 Specs | TechPowerUp GPU Database
Gigabyte GeForce GTX 660 specifications
NVIDIA GeForce GTX 660 Specs | TechPowerUp GPU Database
NVIDIA GeForce GTX 660 review | Eurogamer.net
NVIDIA GeForce GTX 660 Ti and non-Ti Specification (NOT) Confirmed | VideoCardz.com
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