EVGA GeForce GTX670 4GB GDDR5 256-Bit, Dual Dual-Link DVI, HDMI, DisplayPort, 4-Way SLI Ready Graphics Card 04G-P4-3671-KR Base Clock: 915 MHz Boost Clock: 980 MHz Memory Clock: 6008 MHz Cuda Cores: 1344 PCI-Express 3.0 4GB GDDR5 256bit 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