The ASUS GTX550 Ti DirectCU graphics card offers superior DirectX 11 performance in its class and solid tessellation performance by providing the graphics horsepower and video bandwidth needed to experience games in high resolution. At the heart are 192 CUDA cores, 192-bit 1GB GDDR5 graphics memory along with a refined design offering substantial increase in performance while running cooler and quieter than previous generation GTS 450 GPU. Factory overclocked to 910MHz, the ASUS GTX550 Chipset Manufacturer: NVIDIA Core Clock: 910MHz Shader Clock: 1820MHz Stream Processors: 192 Processor Cores Effective Memory Clock: 4104MHz DirectX: DirectX 11 OpenGL: OpenGL 4.1 HDMI: 1 x HDMI