NVIDIA Quadro 4000 2GB GDDR5 Video Card VCQ4000-PB
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
NVIDIA Quadro 4000 Mac Edition Specs | TechPowerUp GPU Database
Genuine PNY nVidia Quadro 4000 for MAC VCQ4000MAC-PB 900-51031-1706-000 Card 751492488554 | eBay
Amazon.com: Nvidia Quadro 4000 2GB GDDR5 256-bit PCI Express 2.0 x16 Full Height Video Card with Rear Bracket (Renewed) : Electronics