EVGA GeForce GTX580 CLASSIFIED 3027 MB Graphics Card (03G-P3-1588-AR) Core Clock: 855MHz Memory Clock: 4212MHz (effective) Shader Clock: 1710MHz NVIDIA CUDA Technology with CUDA C/C++, Direct Compute 5.0 and OpenCL Support NVIDIA PhysX Technology NVIDIA 2-Way, 3-Way and 4-Way SLI Ready NVIDIA 3D Vision Surround Ready EVGA EVBot Connector