NVIDIA announces Kepler-based Quadro K5000 GPU for Mac Pro | Ars Technica
Nvidia Quadro K5000 4GB Graphics Card for Apple Mac Pro | eBay
Nvidia Quadro K5000 4GB Graphics Card | PCSP
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Amazon.com: NVIDIA Quadro 4000 for Mac by PNY 2GB GDDR5 PCI Express Gen 2 x16 DVI-I DL, DisplayPort and Stereo OpenGL, DirectX (Boot Camp), CUDA and OpenCL Profesional Graphics Board, VCQ4000MAC-PB :
Amazon.com: NVIDIA Quadro K5000 4GB GDDR5 PCI-E 2.0 x16 Video Card With Dispalyport and DVI Outputs : Electronics