Ars Reviews the Quadro 4000 Mac Edition: NVIDIA's sole Mac offering a promising start | Ars Technica
NVidia Quadro 4000 Q4000 2GB DDR5 Video Graphics Card DVI DP for Mac Pro 3.1-5.1 | eBay
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 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