GeForce GTX 680 GC 4 GB GDDR5 PCI Express 3.0 DVI/DVI/DP/HDMI SLI Ready Graphics Card with Base Clock 1110MHz, Boost Clock 1176MHz, 1536 CUDA Processors, 3004MHz (6008MHz Effective) Memory Clock, GDDR5 Memory Type, 4096MB Memory Amount, 256-bit Memory Interface and 192.3 GB/sec Memory Bandwidth. Key Features: Factory Overclocked, Custom dual-fan cooling, Quad nickel-plated heatpipes, Special fan blade design minimizes noise, Aluminum cover with LED effects, NVIDIA GPU Boost, NVIDIA Adaptive Vertical Sync, NVIDIA Surround, Support for four concurrent displays including: -Two dual-link DVI, HDMI, Displayport 1.2, Microsoft DirectX 11 with DirectCompute 5.0 support, NVIDIA PhysX technology, NVIDIA 3D Vision Ready, NVIDIA SLI Ready, NVIDIA CUDA technology, PCI Express 3.0 support, OpenGL 4.1 support, OpenCL support.