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NVIDIA Quadro K5000 for Mac VCQK5000MAC-PB 4GB 256-bit GDDR5 PCI Express 2.0 x16 Workstation Video Card - Newegg.com
PNY QUADRO K5000 VCQK5000-BLK B&H Photo Video
Amazon.com: NVIDIA Quadro K5000 4GB GDDR5 PCI-E 2.0 x16 Video Card With Dispalyport and DVI Outputs : Electronics