Used Nvidia Quadro FX 550 128MB GDDR3 SDRAM PCI Express x16 Video Card - Walmart.com
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