Nvidia GT 640/740 1 GB, 2 GB or 4 GB
SPARKLE GT 640 Low Profile OC Specs | TechPowerUp GPU Database
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ZOTAC GeForce GT 640 Review- Tech Reviews, Firstpost
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GeForce GT 640
EVGA GT 640 4 GB Specs | TechPowerUp GPU Database
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MSI GT 640 4 GB Specs | TechPowerUp GPU Database
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ASUS GT 640 4 GB Specs | TechPowerUp GPU Database
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NVIDIA GeForce GT 640M - NotebookCheck.net Tech
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MSI GeForce GT 640 4GB | VideoCardz.net
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GT 640 | ZOTAC
GIGABYTE GT 640 OC Specs | TechPowerUp GPU Database
MSI GeForce GT 640 4GB | VideoCardz.net
