If your monitor only has an HDMI port, then plug an HDMI cable into your GPU. Many lower end GPUs have mini HDMI, get a cable like this: http://www.amazon.com/BlueRigger-High-Speed-cable-Ethernet/dp/B00608WXGA/ref=sr_1_1?ie=UTF8&qid=1385736345&sr=8-1&keywords=mini+hdmi