EVGA GeForce GTX TITAN 6GB GDDR5 384bit, Dual-Link DVI-I, DVI-D, HDMI,DP, SLI Ready Graphics Card (06G-P4-2790-KR) Graphics Cards 06G-P4-2790-KR Base Clock: 837 MHz Boost Clock: 876 MHz Memory Clock: 6008 MHz Effective CUDA Cores: 2688 Memory: 6144MB GDDR5 384bit NVIDIA TXAA, NVIDIA GPU Boost 2.0, NVIDIA PhysX, NVIDIA FXAA, NVIDIA Adaptive Verticle Sync, NVIDIA Surround, NVIDIA 3D Vision Ready, NVIDIA 4-Way SLI Ready, NVIDIA CUDA Technologies PCI express 3.0 Microsoft DirectX 11.1 API with Direct compute 5.0 Support, OpenGL 4.3 Support, OpenCL support