EVGA Geforce GTX660 FTW w/ ACX 2GB GDDR5 192 Bit Dual-Link DVI-I DVI-D HDMI DP SLI Ready Graphics Card (02G-P4-3063-KR) Microsoft DirectX 12 API (feature level 11_0) Support Base Clock: 1072MHz Boost Clock: 1137MHz Memory Clock: 6008MHz Effective CUDA Cores: 960 2048MB GDDR5, 192 Bit Microsoft DirectX 11, OpenGL 4.2 Support 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