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04GP42649AR EVGA GeForce GT 640 4GB 128-bit DDR3 PCI Express 3.0 x16 Dual DVI/ Mini-HDMI/ HDCP Ready Video Graphics Card
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EVGA GeForce GT 640 2GB DDR3 PCI Express 3.0 x16 Video Card 02G-P4-2643-KR GPUs / Video Graphics Cards - Newegg.com
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Amazon.com: MSI NVIDIA GeForce GT 640, 2GB 128-Bit DDR3, HDMI, DL-DVI-D, VGA, PCI Express 3.0 Graphics Card N640GT-MD2GD3 : Electronics
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