NVIDIA Quadro 4000 by PNY 2GB GDDR5 PCI Express Gen 2 x16 DVI-I DL, Dual DisplayPort and Stereo OpenGL, DirectX, CUDA, and OpenCL Profesional Graphics Board, VCQ4000-PB - Newegg.com
NVIDIA Quadro RTX 4000
PNY Quadro 4000 for Mac VCQ4000MAC-PB 2GB 256-bit GDDR5 PCI Express 2.0 x16 Workstation Video Card For MAC - Newegg.com
Quadro 4000 2GB For NVIDIA GDDR5 DVI DP Video Card Professional Graphics Card for Graphic Design Drawing 3D Modeling Rendering|MP3 Players & Amplifier Accessories| - AliExpress
NVIDIA Quadro 4000 Computer Graphics Cards for sale | eBay
NVIDIA Quadro 4000 2GB GDDR5 Video Card VCQ4000-PB