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GV-N640OC-2GI Overview | Graphics Card - GIGABYTE Global
GeForce GT 640 (OEM) | Product Images | GeForce
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/cdn.vox-cdn.com/uploads/chorus_asset/file/12796647/nvidia-kepler-mobile006.1419966379.jpg "Nvidia GeForce GT 640M, 650M, and GTX 660M debut, bring 28nm Kepler to mobile GPUs - The Verge")