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Best Buy: MSI GeForce GT 640 Graphic Card 900 MHz Core 1 GB DDR3 SDRAM PCI Express 3.0 N640GT-MD1GD3
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Amazon.com: Epic IT Service - Geforce GT 640 for Mac Version, with 1GB GDDR5, PCI Express Gen 3.0, DVI-I DL, HDMI 2.0, DisplayPort 1.2, DirectX 12 (Boot Camp) Light Performance Board - OEM : Electronics
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N6401GD5LP MSI N640-1gd5/lp Gt640 1GB DDR5 64bit PCI Express Dual DVI-d/HDMI/d-sub Video Graphics Card
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