EVGA GeForce GTX 650 Ti 1024MB GDDR5 128bit, Dual Dual-Link DVI, Mini HDMI, Graphics Card (01G-P4-3650-KR) Graphics Cards 01G-P4-3650-KR Core Clock: 928 Memory Clock: 5400 MHz Cuda Cores: 768 PCI-Express 3.0 1024MB GDDR5 128 Bit Nvidia SMX Engine, NVidia Adaptive Verticle Sync, Nvidia Surround, Support for Concurrent Displays, Nvidia PhysX, Nvidia 3D Vision Ready, Nvidia SLI Ready, Nvidia CUDA Technology Microsoft DirectX 11, NVIDIA PhysX Technology, NVIDIA 3D Vision Ready, NVIDIA CUDA Technology, PCI-Express 3.0 Support, OpenGL 4.3 Support