EVGA GeForce GTX660 3GB GDDR5 192-Bit, Dual DVI-D, HDMI, DP, 3-Way SLI Ready Graphics Card  03G-P4-2664-KR Base Clock: 980 MHz Boost Clock: 1033 MHz Memory Clock: 6008 MHz Cuda Cores: 960 PCI-Express 3.0 3GB GDDR5 192bit Nvidia SMX Engine, Nvidia GPU Boost, NVidia Adaptive Vertical Sync, Nvidia Surround, Support for Concurrent Displays, Nvidia PhysX, Nvidia 3D Vision Ready, Nvidia SLI Ready, Nvidia CUDA Technology