EVGA GeForce GTX 680 FTW 4096MB GDDR5, DVI, DVI-D, HDMI, DisplayPort, 4-way SLI Ready Graphics Card (04G-P4-3687-KR) Graphics Cards 04G-P4-3687-KR Base Clock: 1084MHz Boost Clock: 1150 MHz Memory Clock: 6008MHz Cuda Cores: 1536 PCI-e 3.0 4096MB GDDR5 256bit 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