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 :
NeweggBusiness - NVIDIA Quadro Q4000 2GB DDR5 Profesional Graphics Board Graphics Video Card Dual DVI+DP for HP Dell 0731Y3
High quality Quadro 4000 Q4000 2G DDR5 cards with DVI DP connector CUDA OpenCL for mac pro 2008-2012 sent by DHL/EMS - AliExpress