Gigabyte GeForce GTX 680 OC. Graphics processor: GeForce GTX 680, Graphics processor family: NVIDIA, Processor clock speed: 1137 MHz. Graphic adapter memory: 2048 MB, Graphics adapter memory type: GDDR5-SDRAM, Memory bus: 256 bit. Interface type: PCI Express 3.0. Shader model version: 4.1, OpenGL version: 4.2, HDMI version: 1.4a. Supplementary power connectors: 2x 6-pin