ASUS GeForce GTX Titan Z 12GB GDDR5 Graphics Card - GTXTITANZ-12GD5 Gigantic 12GB GDDR5 memory for the best gaming experience & the best resolution NVIDIA GPU Boost 2.0 Technology for intelligent monitoring of clock speed, ensuring that the GPU runs at its peak and the game is at its highest frame rate possible ASUS exclusive GPU Tweak helps you modify clock speeds, voltages, fan performance and more, all via an intuitive interface GPU Tweak Streaming tool allows you to share on-screen action in real-time. Add scrolling text, pictures, and webcam images to the streaming window easily PCI Express 3.0 Delivers double bandwidth per lane of PCIe Gen 2 for faster GPU - CPU communication