EVGA GeForce GTX 680+ 4096 MB GDDR5 Dual Dual-Link DVI/mHDMI/DP/SLI Graphics Card (04G-P4-3685-KR) Base Clock: 1006 MHz Boost Clock: 1058 MHz Memory Clock: 6008 MHz CUDA Cores: 1536 PCI-Express 3.0 4096 MB GDDR5 256bit, 4 GB 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