Galaxy GeForce GTX 680 GC 4 GB GDDR5 PCI Express 3.0 DVI/DVI/DP/HDMI SLI Ready Graphics Card, 68NQH6DN6DXZ Graphics Cards 68NQH6DN6DXZ Factory Overclocked Custom dual-fan cooling with aluminum cover and LED effects Quad nickel-plated heatpipes Double frame buffer NVIDIA GPU Boost NVIDIA Adaptive Vertical Sync NVIDIA Surround Factory Overclocked Custom dual-fan cooling with aluminum cover and LED effects Quad nickel-plated heatpipes Double frame buffer NVIDIA GPU Boost NVIDIA Adaptive Vertical Sync NVIDIA Surround NVIDIA PhysX technology