Quardo K4000 PNY Graphics Card for sale: NVIDIA® Quadro® K4000 VCQK4000-PB 3GB GDDR5 PCI Express 2.0 x16 Workstation Video Card Chipset Manufacturer: NVIDIA CUDA Cores: 768 DirectX: DirectX 11 OpenGL: OpenGL 4.3 Model #: VCQK4000-PB