NVIDIA Quadro K4000 ultra-fast Performance 3GB Graphics Card - Great for AutoCad!
Best Buy: HP Quadro 4000 Graphic Card 2 GB GDDR5 SDRAM PCI Express 2.0 x16 WS095AT
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 :