HP NVIDIA Quadro K4000 3GB DL-DVI+2xDP Graphics Card C2J94AT B&H
Amazon.com: NVIDIA Quadro FX 580 by PNY 512MB GDDR3 PCI Express Gen 2 x16 DVI-I DL and Dual DisplayPort OpenGL, DirectX, CUDA and OpenCL Profesional Graphics Board, VCQFX580-PCIE-PB : Electronics