Amazon.com: Epic IT Service - Quadro 4000 for Mac, for Apple mac pro, 2GB GDDR5 PCI Express Gen 2 x16, DVI-I DL, DisplayPort, CUDA and OpenCL Profesional Board (Attn: Legacy Model) : Electronics
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 :
8 x NVIDIA Quadro RTX 4000 ! CTOServers RTX GPU server , 48 Core High Density Server ! V-Ray 5 - YouTube