EVGA GeForce GTX650Ti Boost 1GB GDDR5 192-Bit, Dual-Link DVI-I, DVI-D, HDMI,DP, SLI Ready Graphics Card 01G-P4-3655-KR Base Clock: 980 MHz Boost Clock: 1033 MHz Memory Clock: 6008 MHz Effective CUDA Cores: 768 Memory: 1GB GDDR5 192bit NVIDIA GPU Boost, NVIDIA PhysX, NVIDIA Adaptive Vertical Sync, NVIDIA Surround, NVIDIA 3D Vision Ready, NVIDIA 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