Refurbished: PNY nVidia Quadro 4000 for MAC 2GB GDDR5 High-End Video Card - Newegg.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 : Electronics - Amazon.com
NVIDIA Quadro 4000 Mac Edition Specs | TechPowerUp GPU Database
NVIDIA Quadro 4000 2GB GDDR5 Video Card VCQ4000-PB
VCQ4000-T - Refurbished - PNY NVIDIA QUADRO 4000 GRAPHICS CARD 2GB 256 CUDA CORES MEMORY INTERFACE 256 BIT GDDR5 MEMORY BANDWIDTH 89.6GB/S PCI-E 2.0 X16 COOLING SYSTEM ( 1 ) ONE HEATSINK (
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 - Amazon.com
Refurbished: nVidia Quadro 4000 2GB GDDR5 PCI-E x16 2.0 Graphics Video Card With DVI and DisplayPort Outputs 38XNM Standard Height Workstation Video Card - Newegg.com