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nVidia Quadro 4000 2GB GDDR5 PCI-E x16 2.0 Video Card Dell 38XNM [Quadro 4000] - $175.00 : Professional Multi Monitor Workstations, Graphics Card Experts
PNY NVIDIA Quadro 4000 (VCQ4000-PB) 2GB / 2GB (max) GDDR5 SDRAM PCI Express x16 Video Card for sale online | eBay
HP NVIDIA QUADRO 4000 2gb Video Card 608533-003 for sale online | eBay
NVIDIA Quadro 4000 PCIe 2GB GDDR5 graphics memory - With 1 Dual Link DVI-I and 2 DisplayPort ports - Maximum display resolution 2,560 x 1,600 pixels at 60Hz - Mac Palace | Mac Parts Store