EVGA GeForce GTX 660Ti+ 3072MB GDDR5 DVI-I, DVI-D, HDMI, DP, SLI Graphics Card (03G-P4-3661-KR) Graphics Cards 03G-P4-3661-KR Base Clock: 915 MHz Boost Clock: 980 MHz Memory Clock: 6008 MHz CUDA Cores: 1344 PCI-Express 3.0 3072MB GDDR5 192bit Nvidia SMX Engine, Nvidia GPU Boost, NVidia Adaptive Verticle Sync, Nvidia Surround, Support for Concurrent Displays, Nvidia PhysX, Nvidia 3D Vision Ready, Nvidia SLI Ready, Nvidia CUDA Technology