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HP NVIDIA GeForce GT 640 4GB 723678-001 717540-001 Video card [GT640] - $149.00 : Professional Multi Monitor Workstations, Graphics Card Experts
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Refurbished and Used Hardware | ZOTAC GeForce GT 640 4GB DDR3 PCI Express (PCIe) DVI Video Card w/HDMI & HDCP Support
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Amazon | EVGA GeForce GT 640 2048MB GDDR3 Dual DVI mHDMI グラフィックカード 02G-P4-2643-KR | EVGA | グラフィックボード 通販
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