XFX AMD Radeon HD 6790 840 MHz 1 GB DDR5 Dual MiniDisplayPort Video Card (HD-679X-ZDFC) Interface:PCI Express 2.1 x16, GPU:Radeon HD 6790, Core Clock:840MHz, Stream Processors:800 Stream Processing Units, Effective Memory Clock:1050MHz (4.2Gbps), Memory Size:1GB, Memory Type:GDDR5, DirectX 11. Ports: 1 x HDMI, 2 x Mini DisplayPort, 2 x DVI (1 Single Link, 1 Dual Link), Can support 4 monitors total, because HDMI is a share port with a DVI. Max Resolution 2560 x 1600, Minimum 500W (2 x 6 Pin).