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Amazon.com: NVIDIA Quadro 4000 by PNY 2GB GDDR5 PCI Express Gen 2 x16 DVI-I DL, Dual DisplayPort and Stereo OpenGL, DirectX, CUDA, and OpenCL Professional Graphics Board, VCQ4000-PB : Electronics
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Refurbished: HP Z620 Workstation E5-2660 v2 2.2GHz 10-Cores 16GB DDR3 Quadro 4000 2TB HDD Windows 10 Pro - Newegg.com
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Amazon.com: NVIDIA Quadro 4000 by PNY 2GB GDDR5 PCI Express Gen 2 x16 DVI-I DL, Dual DisplayPort and Stereo OpenGL, DirectX, CUDA, and OpenCL Professional Graphics Board, VCQ4000-PB : Electronics
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