EVGA GeForce GTX 660 SIGNATURE2 LE 3072MB GDDR5 DVI mHDMI DP Graphics Card 03G-P4-2665-KR Microsoft DirectX 12 API (feature level 11_0) Support Base Clock: 1046 MHz Boost Clock: 1111 Memory Clock: 6008 MHz CUDA Cores: 960 PCI-Express 3.0 3072MB GDDR5 192-Bit Nvidia SMX Engine, NVidia Adaptive Vertical Sync, Nvidia Surround, Support for 4 Concurrent Displays, Nvidia PhysX, Nvidia 3D Vision Ready, Nvidia CUDA Technology